Best sources ranked · 2026
Best TB-500 Sources
87 US vendors carry TB-500. Ordered below by the lab-rule score of each vendor’s certificate for TB-500, then by the vendor’s published score; prices are per milligram. Synthetic peptide corresponding to the active region of thymosin beta-4, a naturally occurring 43-amino-acid protein. Sold for laboratory research use only.
- Vendors
- 87
Vendors
- With COAs
- 69
With COAs
- Best $/mg
- $1.96
Best $/mg
Looking for the top picks? Best TB-500 vendors, ranked by PSR score →
New to TB-500? What is TB-500? Our plain-English, research-use-only guide: what it is and how to spot a verified source.TB-500 research guide →
Every TB-500 source, by certificate
Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. How the lab rule scores a certificate. For the market-wide picture, see our 2026 study of peptide vendor testing.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
9.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.84certificate
Vendor score 8.09/10Strong
- Price per mg
- $4.80
- Best price
- $48.00 / 10mg
9.5/103 base, +2 TrustPointe Analytics tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.769certificate
Vendor score 6.97/10Fair
- Price per mg
- $13.40
- Best price
- $133.99 / 10mg
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.51certificate
Vendor score 8.02/10Strong
- Price per mg
- $4.00
- Best price
- $39.99 / 10mg
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.613certificate
Vendor score 7.98/10Strong
- Price per mg
- $4.50
- Best price
- $44.99 / 10mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.48certificate
Vendor score 7.88/10Strong
- Price per mg
- $5.90
- Best price
- $59.00 / 10mg
9.0/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.8certificate
Vendor score 7.68/10Strong
- Price per mg
- $9.00
- Best price
- $44.99 / 5mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.21certificate
Vendor score 7.67/10Strong
- Price per mg
- $8.50
- Best price
- $85.00 / 10mg
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.666certificate
Vendor score 7.55/10Strong
- Price per mg
- $10.80
- Best price
- $54.00 / 5mg
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.43certificate
Vendor score 7.45/10Strong
- Price per mg
- $5.00
- Best price
- $49.99 / 10mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.91certificate
Vendor score 7.37/10Strong
- Price per mg
- $6.50
- Best price
- $65.00 / 10mg
Show 77 more carriers
9.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.39certificate
Vendor score 7.12/10Strong
- Price per mg
- $6.25
- Best price
- $125.00 / 20mg
12BulkGLP
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.44certificateVendor score 6.49/10Fair
- Price per mg
- $8.40
- Best price
- $84.00 / 10mg
9.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.8certificate
Vendor score 6.14/10Fair
- Price per mg
- $5.90
- Best price
- $59.00 / 10mg
9.0/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.77certificate
Vendor score 5.95/10Fair
- Price per mg
- $5.80
- Best price
- $58.00 / 10mg
8.5/103 base, +2 Ethos Analytics Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99certificate
Vendor score 7.88/10Strong
- Price per mg
- $4.90
- Best price
- $49.00 / 10mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.703certificate
Vendor score 7.75/10Strong
- Price per mg
- $3.60
- Best price
- $36.00 / 10mg
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.116certificate
Vendor score 7.67/10Strong
- Price per mg
- $6.20
- Best price
- $62.00 / 10mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.309certificate
Vendor score 7.51/10Strong
- Price per mg
- $7.00
- Best price
- $70.00 / 10mg
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.23certificate
Vendor score 7.43/10Strong
- Price per mg
- $9.90
- Best price
- $99.00 / 10mg
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.9certificate
Vendor score 7.30/10Strong
- Price per mg
- $5.70
- Best price
- $57.00 / 10mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.87certificate
Vendor score 7.17/10Strong
- Price per mg
- $7.00
- Best price
- $35.00 / 5mg
22VoriLabs
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.03certificateVendor score 6.87/10Fair
- Price per mg
- $8.00
- Best price
- $79.99 / 10mg
23Peptyes
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.46certificateVendor score 6.55/10Fair
- Price per mg
- $10.20
- Best price
- $102.00 / 10mg
8.5/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.8certificate
Vendor score 6.54/10Fair
- Price per mg
- $14.00
- Best price
- $140.00 / 10mg
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.34certificate
Vendor score 6.44/10Fair
- Price per mg
- $10.00
- Best price
- $49.99 / 5mg
8.5/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.83certificate
Vendor score 5.79/10Fair
- Price per mg
- $12.40
- Best price
- $124.00 / 10mg
8.5/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.83certificate
Vendor score 5.70/10Fair
- Price per mg
- $15.20
- Best price
- $152.00 / 10mg
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.989certificate
Vendor score 5.62/10Fair
- Price per mg
- $7.80
- Best price
- $39.00 / 5mg
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.833certificate
Vendor score 4.58/10Weak
- Price per mg
- $14.00
- Best price
- $70.00 / 5mg
8.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.1certificate
Vendor score 8.17/10Strong
- Price per mg
- $9.50
- Best price
- $95.00 / 10mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.521certificate
Vendor score 7.94/10Strong
- Price per mg
- $6.50
- Best price
- $65.00 / 10mg
8.0/103 base, +2 BioRegen tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.62certificate
Vendor score 7.78/10Strong
- Price per mg
- $8.00
- Best price
- $40.00 / 5mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.35certificate
Vendor score 7.42/10Strong
- Price per mg
- $6.30
- Best price
- $63.00 / 10mg
34Kyreon
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.62certificateVendor score 7.29/10Strong
- Price per mg
- $5.40
- Best price
- $54.00 / 10mg
35VERATIS
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.19certificateVendor score 7.21/10Strong
- Price per mg
- $7.50
- Best price
- $75.00 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.53certificate
Vendor score 7.15/10Strong
- Price per mg
- $6.00
- Best price
- $59.95 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.12certificate
Vendor score 6.99/10Fair
- Price per mg
- $3.40
- Best price
- $33.99 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.54certificate
Vendor score 6.98/10Fair
- Price per mg
- $7.60
- Best price
- $37.99 / 5mg
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.69certificate
Vendor score 6.88/10Fair
- Price per mg
- $7.50
- Best price
- $74.99 / 10mg
8.0/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.67certificate
Vendor score 6.88/10Fair
- Price per mg
- $14.00
- Best price
- $69.99 / 5mg
8.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.1certificate
Vendor score 6.50/10Fair
- Price per mg
- $7.00
- Best price
- $69.99 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.45certificate
Vendor score 6.43/10Fair
- Price per mg
- $7.50
- Best price
- $74.99 / 10mg
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.39certificate
Vendor score 6.34/10Fair
- Price per mg
- $8.50
- Best price
- $84.95 / 10mg
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.64certificate
Vendor score 6.14/10Fair
- Price per mg
- $5.00
- Best price
- $49.99 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.437certificate
Vendor score 6.14/10Fair
- Price per mg
- $6.50
- Best price
- $65.00 / 10mg
8.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.288certificate
Vendor score 6.08/10Fair
- Price per mg
- $9.00
- Best price
- $89.99 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.46certificate
Vendor score 5.45/10Weak
- Price per mg
- $8.90
- Best price
- $89.00 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.08certificate
Vendor score 5.39/10Weak
- Price per mg
- $4.24
- Best price
- $42.36 / 10mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.062certificate
Vendor score 4.50/10Weak
- Price per mg
- $13.00
- Best price
- $129.99 / 10mg
8.0/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.44certificate
Vendor score 3.38/10Poor
- Price per mg
- $33.50
- Best price
- $335.00 / 10mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.54certificate
Vendor score 3.27/10Poor
- Price per mg
- $11.00
- Best price
- $110.00 / 10mg
7.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, -1.5 purity 98.94certificate
Vendor score 7.80/10Strong
- Price per mg
- $7.50
- Best price
- $75.00 / 10mg
7.5/103 base, +2 MDx BioAnalytical Laboratory tier A+, +1.5 key, +0 key not found at the lab, +0.5 endotoxin, +0 accreditation (tested 2026-05-18, before 2026-06-09), +0.5 purity 99.76certificate
Vendor score 7.24/10Strong
- Price per mg
- $16.50
- Best price
- $164.97 / 10mg
7.5/103 base, +2 Chromate tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, -1.5 purity 98.342certificate
Vendor score 6.65/10Fair
- Price per mg
- $5.50
- Best price
- $55.00 / 10mg
7.0/103 base, +2 Ethos Analytics Laboratory tier B+, +1.5 key, +0.5 endotoxin, no purity figurecertificate
Vendor score 6.75/10Fair
- Price per mg
- $4.00
- Best price
- $39.99 / 10mg
56Curo
7.0/103 base, +2 BT Labs tier B, +1.5 key, +0.5 endotoxin, 0 purity 99.6certificateVendor score 6.27/10Fair
- Price per mg
- $10.80
- Best price
- $54.00 / 5mg
6.5/103 base, +2 BT Labs tier B, +1.5 key, 0 purity 99.6certificate
Vendor score 7.14/10Strong
- Price per mg
- $7.00
- Best price
- $69.99 / 10mg
6.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 97.489certificate
Vendor score 6.93/10Fair
- Price per mg
- $8.30
- Best price
- $83.00 / 10mg
6.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 98.855certificate
Vendor score 6.76/10Fair
- Price per mg
- $6.00
- Best price
- $59.99 / 10mg
6.5/103 base, +2 BT Labs tier B, +1.5 key, 0 purity 99.6certificate
Vendor score 2.13/10Poor
- Price per mg
- $1.96
- Best price
- $196.00 / 10 x 10mg pack
5.5/103 base, +2 MDx BioAnalytical Laboratory tier A+, +0 accreditation (tested 2025-08-12, before 2026-06-09), +0.5 purity 99.9certificate
Vendor score 5.78/10Fair
- Price per mg
- $5.35
- Best price
- $53.55 / 10mg
5.5/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +0.5 endotoxin, -1.5 purity 98.3certificate
Vendor score 4.30/10Weak
- Price per mg
- $7.00
- Best price
- $69.99 / 10mg
5.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +0 key not found at the lab, -1.5 purity 97.16certificate
Vendor score 6.03/10Fair
- Price per mg
- $6.00
- Best price
- $59.99 / 10mg
5.0/103 base, +2 AV Analytics tier A-, no purity figurecertificate
Vendor score 4.80/10Weak
- Price per mg
- $7.00
- Best price
- $70.00 / 10mg
5.0/103 base, +0 Analytical Formulations tier C, +1.5 key, +0.5 purity 99.8certificate
Vendor score 4.54/10Weak
- Price per mg
- $14.00
- Best price
- $140.00 / 10mg
66GenX Bio
5.0/103 base, +2 MZ Biolabs tier A, 0 purity 99certificateVendor score 4.45/10Weak
- Price per mg
- $16.50
- Best price
- $33.00 / 2mg
2.0/10no laboratory named on the certificate = 2.0 flatcertificate
Vendor score 5.01/10Weak
Vendor report (lab not established) (opens in new tab)Third-party lab (undisclosed)
- Price per mg
- $8.50
- Best price
- $84.99 / 10mg
2.0/10North American Diagnostics tier D: independence not established = 2.0 flatcertificate
Vendor score 3.95/10Poor
- Price per mg
- $8.00
- Best price
- $79.99 / 10mg
2.0/10Proof Point Analytical tier D: independence not established = 2.0 flatcertificate
Vendor score 3.92/10Poor
- Price per mg
- $5.00
- Best price
- $49.99 / 10mg
2.0/10Mistral Diagnostics tier D: independence not established = 2.0 flatcertificate
Vendor score 3.76/10Poor
- Price per mg
- $4.50
- Best price
- $45.00 / 10mg
2.0/10Verum Analytics tier D: independence not established = 2.0 flatcertificate
Vendor score 3.70/10Poor
- Price per mg
- $9.50
- Best price
- $95.00 / 10mg
2.0/10Amino Metrics tier D: independence not established = 2.0 flatcertificate
Vendor score 3.63/10Poor
- Price per mg
- $3.80
- Best price
- $37.99 / 10mg
2.0/10self-issued by the vendor = 2.0 flatcertificate
Vendor score 3.25/10Poor
- Price per mg
- $5.50
- Best price
- $55.00 / 10mg
2.0/10Titreon Analytical tier D: independence not established = 2.0 flatcertificate
Vendor score 2.38/10Poor
- Price per mg
- $22.00
- Best price
- $220.00 / 10mg
0.0/10posted copy differs from the lab's copy = 0certificate
Vendor score 5.60/10Fair
- Price per mg
- $7.57
- Best price
- $75.65 / 10mg
0.0/10no certificatecertificate
Vendor score 5.50/10Fair
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $4.50
- Best price
- $44.99 / 10mg
0.0/10no certificatecertificate
Vendor score 4.70/10Weak
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $13.90
- Best price
- $139.00 / 10mg
0.0/10no certificatecertificate
Vendor score 3.77/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $9.00
- Best price
- $89.99 / 10mg
0.0/10no certificatecertificate
Vendor score 3.68/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $3.20
- Best price
- $32.00 / 10mg
0.0/10no certificatecertificate
Vendor score 3.62/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $18.63
- Best price
- $37.25 / 2mg
0.0/10no certificatecertificate
Vendor score 3.23/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $4.90
- Best price
- $49.00 / 10mg
0.0/10no certificatecertificate
Vendor score 3.06/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $7.00
- Best price
- $35.00 / 5mg
0.0/10no certificatecertificate
Vendor score 2.67/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $4.60
- Best price
- $45.95 / 10mg
0.0/10posted copy differs from the lab's copy = 0certificate
Vendor score 2.51/10Poor
- Price per mg
- —
- Best price
- —
0.0/10no certificatecertificate
Vendor score 2.46/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $5.60
- Best price
- $560.00 / 10 x 10mg pack
0.0/10no certificatecertificate
Vendor score 2.23/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $28.12
- Best price
- $56.24 / 2mg
87PepVial
0.0/10no certificatecertificateVendor score 1.92/10Poor
NoneNo third-party COA was publicly available at audit time
- Price per mg
- $9.80
- Best price
- $49.00 / 5mg
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Compare TB-500 vendors by PSR score
Every vendor we track that carries TB-500 (87 in all), ordered by PSR score, the published vendor score. For laboratory research use only: this compares vendors and their certificates, and says nothing about dosing or effects.
Price per mg is matched at 10mg, the size most of these vendors sell, so vials compare like for like. Prices as checked October 22, 2026 to November 6, 2026. Certificate status is for this product only. Affiliate status never affects scores or order (how we keep it separate). 30 vendors marked “Fails testing gate” do not meet our testing gate.
View:by PSR scoreby price per mg at 10mg
| Vendor | Sizes (mg) | Certificate and lab | Stock | ||||
|---|---|---|---|---|---|---|---|
| Zeptix Labs | 8.17Strong | $9.50$95.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Accumark LabsTier B+ | 99.1% | In stock | |
| Southern Aminos | 8.09Strong | $4.80$48.00 for 10mg | 10 | Confirmed at lab (opens in new tab)ILS LaboratoriesTier B+ | 99.84% | Out of stockOut of stock on 2026-10-16. | |
| Amino Club | 8.02Strong | $4.00$39.99 for 10mg | 10 | Confirmed at lab (opens in new tab)ILS LaboratoriesTier B+ | 99.51% | In stock | |
| Transition Biotech | 7.98Strong | $4.50$44.99 for 10mg | 10 | Confirmed at lab (opens in new tab)Kovera LabsTier A- | 99.613% | In stock | |
| Prime Peptides | 7.94Strong | $6.50$65.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 99.521% | In stock | |
| Modern Aminos | 7.88Strong | $5.90$59.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.48% | In stock | |
| Pure Health Peptides | 7.88Strong | $4.90$49.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Ethos Analytics LaboratoryTier B+ | 99% | In stock | |
| Ameano Peptides | 7.80Strong | $7.50$75.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 98.94% | In stock | |
| Amino USA | 7.78Strong | $8.00$80.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)BioRegenTier A | 99.62% | In stock | |
| S1Research | 7.75Strong | $3.60$36.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.703% | In stock | |
| Loti Labs | 7.68Strong | No 10mg$9.00/mg at 5mg | 2, 5 | Confirmed at lab (opens in new tab)BioviridianTier A- | 99.8% | In stock | |
| Protide Health | 7.67Strong | $8.50$85.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.21% | In stock | |
| Verified Peptides | 7.67Strong | $6.20$62.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 99.116% | In stock | |
| Ascension Peptides | 7.55Strong | No 10mg$10.80/mg at 5mg | 5 | Confirmed at lab (opens in new tab)Kovera LabsTier A- | 99.666% | In stock | |
| Felix Chemical Supply | 7.51Strong | $7.00$70.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.309% | first seen | In stock |
| Thrive Peptides | 7.45Strong | $5.00$49.99 for 10mg | 10 | Confirmed at lab (opens in new tab)ILS LaboratoriesTier B+ | 99.43% | In stock | |
| Direct Peptides | 7.43Strong | $9.90$99.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Horizon AnalyticalTier A- | 99.23% | In stock | |
| Honest Peptide | 7.42Strong | $6.30$63.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.35% | In stock | |
| Bluum Peptides | 7.37Strong | $6.50$65.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.91% | In stock | |
| Oasis Labs | 7.30Strong | $5.70$57.00 for 10mg | 10 | Confirmed at lab (opens in new tab)BioviridianTier A- | 99.9% | In stock | |
| Kyreon | 7.29Strong | $5.40$54.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.62% | first seen | Store not taking ordersObserved October 22, 2026 |
| BioLongevity Labs | 7.24Strong | $16.50$164.97 for 10mg | 10 | Posted (opens in new tab)MDx BioAnalytical LaboratoryTier A+ | 99.76% | In stock | |
| VERATIS | 7.21Strong | $7.50$75.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.19% | In stock | |
| Peptides Source | 7.17Strong | $7.00$70.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.87% | In stock | |
| Pacific Edge Labs | 7.15Strong | $6.00$59.95 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.53% | In stock | |
| Prime Peptide Solutions | 7.14Strong | $7.00$69.99 for 10mg | 10 | Posted (opens in new tab)BT LabsTier B | 99.6% | In stock | |
| Paramount Peptides | 7.12Strong | $6.80$68.00 for 10mg | 5, 10, 20 | Confirmed at lab (opens in new tab)Accumark LabsTier B+ | 99.39% | In stock | |
| StudzPeptides | 6.99Fair | $3.40$33.99 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.12% | In stock | |
| Arctic Lab Supply | 6.98Fair | No 10mg$7.60/mg at 5mg | 5 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.54% | In stock | |
| Limitless Biotech | 6.97Fair | $13.40$133.99 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)TrustPointe AnalyticsTier B+ | 99.769% | In stock | |
| NuuVive Peptides | 6.93Fair | $8.30$83.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 97.489% | first seen | In stock |
| Rogue Compounds | 6.88Fair | $7.50$74.99 for 10mg | 10 | Confirmed at lab (opens in new tab)ILS LaboratoriesTier B+ | 99.69% | In stock | |
| Sports Technology Labs | 6.88Fair | No 10mg$14.00/mg at 5mg | 5 | Confirmed at lab (opens in new tab)MZ BiolabsTier A | 99.67% | In stock | |
| VoriLabs | 6.87Fair | $8.00$79.99 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.03% | first seen | In stock |
| Apollo Peptide Sciences | 6.76Fair | $6.00$59.99 for 10mg | 10 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 98.855% | In stock | |
| Modified AminosFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 6.75Fair | $4.00$39.99 for 10mg | 10 | Posted (opens in new tab)Ethos Analytics LaboratoryTier B+ | Not shown | first seen | In stock |
| Profound Aminos | 6.65Fair | $5.50$55.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)ChromateTier B+ | 98.342% | In stock | |
| Peptyes | 6.55Fair | $10.20$102.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Horizon AnalyticalTier A- | 99.46% | In stock | |
| Core Peptides | 6.54Fair | $14.00$140.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Vanguard LaboratoryTier B+ | 99.8% | In stock | |
| FRO Peptides | 6.50Fair | $7.00$69.99 for 10mg | 10 | Confirmed at lab (opens in new tab)Accumark LabsTier B+ | 99.1% | In stock | |
| BulkGLP | 6.49Fair | $8.40$84.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.44% | In stock | |
| Pinnacle Peptide Labs | 6.44Fair | No 10mg$10.00/mg at 5mg | 5 | Confirmed at lab (opens in new tab)Horizon AnalyticalTier A- | 99.34% | In stock | |
| NuScience Peptides | 6.43Fair | $7.50$74.99 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.45% | In stock | |
| JD BioWorks | 6.34Fair | $8.50$84.95 for 10mg | 10 | Confirmed at lab (opens in new tab)ILS LaboratoriesTier B+ | 99.39% | first seen | In stock |
| CuroFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 6.27Fair | No 10mg$10.80/mg at 5mg | 5 | Posted (opens in new tab)BT LabsTier B | 99.6% | first seen | In stock |
| GhostLabz | 6.14Fair | $5.00$49.99 for 10mg | 10 | Confirmed at lab (opens in new tab)ILS LaboratoriesTier B+ | 99.64% | In stock | |
| Hello Stacks | 6.14Fair | $5.90$59.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Vanguard LaboratoryTier B+ | 99.8% | In stock | |
| Research Peptides Lab | 6.14Fair | $6.50$65.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.437% | In stock | |
| OMNI Peptides | 6.08Fair | $9.00$89.99 for 10mg | 10 | Confirmed at lab (opens in new tab)Accumark LabsTier B+ | 99.288% | In stock | |
| Bionova Peptides | 6.03Fair | $6.00$59.99 for 10mg | 10 | Posted (opens in new tab)Freedom Diagnostics TestingTier A | 97.16% | In stock | |
| NextGen Peps | 5.95Fair | $5.80$58.00 for 10mg | 10 | Confirmed at lab (opens in new tab)BioviridianTier A- | 99.77% | In stock | |
| Biotech Peptides | 5.79Fair | $12.40$124.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)MZ BiolabsTier A | 99.83% | In stock | |
| AminoVault | 5.78Fair | $5.35$53.55 for 10mg | 10 | Posted (opens in new tab)MDx BioAnalytical LaboratoryTier A+ | 99.9% | In stock | |
| Raw Amino | 5.70Fair | $15.20$152.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)MZ BiolabsTier A | 99.83% | In stock | |
| Amino AmigosFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 5.62Fair | No 10mg$7.80/mg at 5mg | 5 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 99.989% | In stock | |
| Peptide Pro | 5.60Fair | $7.57$75.65 for 10mg | 10 | Posted, differs from lab copy (opens in new tab)Horizon AnalyticalTier A- | 99.46% | In stock | |
| Vortex Research | 5.50Fair | $4.50$44.99 for 10mg | 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Azyrion Labs | 5.45Weak | $8.90$89.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.46% | In stock | |
| Swiss ChemsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 5.39Weak | $4.24$42.36 for 10mg | 2, 5, 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.08% | In stock | |
| Peptide WarehouseFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 5.01Weak | $8.50$84.99 for 10mg | 5, 10 | Posted, source not established (opens in new tab)Third-party lab (undisclosed) | Not shown | In stock | |
| Redline Bio LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 4.80Weak | $7.00$70.00 for 10mg | 5, 10 | Posted (opens in new tab)AV AnalyticsTier A- | Not shown | Undated | In stock |
| Vyal LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 4.70Weak | $13.90$139.00 for 10mg | 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Delix Labs | 4.58Weak | No 10mg$14.00/mg at 5mg | 5 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 99.833% | In stock | |
| Based ResearchFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 4.54Weak | $14.00$140.00 for 10mg | 5, 10 | Posted (opens in new tab)Analytical FormulationsTier C | 99.8% | first seen | In stock |
| Cernum Biosciences | 4.50Weak | $13.00$129.99 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)Janoshik AnalyticalTier B+ | 99.062% | In stock | |
| GenX BioFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 4.45Weak | No 10mg$16.50/mg at 2mg | 2 | Posted (opens in new tab)MZ BiolabsTier A | 99% | In stock | |
| Ageless PeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 4.30Weak | $7.00$69.99 for 10mg | 10 | Posted (opens in new tab)Vanguard LaboratoryTier B+ | 98.3% | In stock | |
| PSPeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.95Poor | $8.00$79.99 for 10mg | 5, 10 | Posted, source not established (opens in new tab)North American DiagnosticsTier D | Not shown | In stock | |
| Prism LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.92Poor | $5.00$49.99 for 10mg | 5, 10 | Posted, source not established (opens in new tab)Proof Point AnalyticalTier D | Not shown | first seen | In stock |
| Peptide LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.77Poor | $9.00$89.99 for 10mg | 5, 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Peptide.ExpressFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.76Poor | $4.50$45.00 for 10mg | 5, 10 | Posted, source not established (opens in new tab)Mistral DiagnosticsTier D | Not shown | In stock | |
| BioInfinityFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.70Poor | $9.50$95.00 for 10mg | 5, 10 | Posted, source not established (opens in new tab)Verum AnalyticsTier D | Not shown | In stock | |
| Lotus PeptideFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.68Poor | $3.20$32.00 for 10mg | 5, 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Pexo LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.63Poor | $3.80$37.99 for 10mg | 10 | Posted, source not established (opens in new tab)Amino MetricsTier D | Not shown | In stock | |
| Peptide ProsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.62Poor | No 10mg$18.63/mg at 2mg | 2 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Spartan PeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.38Poor | $33.50$335.00 for 10mg | 5, 10 | Confirmed at lab (opens in new tab)MZ BiolabsTier A | 99.44% | In stock | |
| Nextday PeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.27Poor | $11.00$110.00 for 10mg | 10 | Confirmed at lab (opens in new tab)Freedom Diagnostics TestingTier A | 99.54% | In stock | |
| RapidCore BioFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.25Poor | $5.50$55.00 for 10mg | 10 | Posted, source not established (opens in new tab) | Not shown | In stock | |
| Drexa LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.23Poor | $4.90$49.00 for 10mg | 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Snowman ResearchFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 3.06Poor | No 10mg$7.00/mg at 5mg | 5 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| AnhydrolabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 2.67Poor | $4.60$45.95 for 10mg | 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Stack ResearchFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 2.51Poor | No price listed | Not listed | Posted, differs from lab copy (opens in new tab)Accumark LabsTier B+ | 99.1% | No price listedTB-500 10 mg is shown 'Out of stock' on the product page and is absent from the Store API catalogue on 2026-11-01; the product is still listed, so it is carried, but an out-of-stock size is not priced. Price is the single-vial price a buyer pays on 2026-11-01 (WooCommerce Store API and product page): every product is on an undated sale that is not tied to an event or season, so under rule E the sale price is the price at this first review and the higher regular price in the Store API is not used. Not counted (rule E1): the sitewide code STACK20, the first-order email code, the automatic volume pricing at 3, 5 and 10 vials, and the 3-item and 5-item Stack Builder discounts, which need a code or more than one vial. | |
| Peptide Warehouse USFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 2.46Poor | $5.60$560.00 for 10 x 10mg pack | 5, 10 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Peptara LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 2.38Poor | $22.00$220.00 for 10mg | 10 | Posted, source not established (opens in new tab)Titreon AnalyticalTier D | Not shown | In stock | |
| PepBioticsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 2.23Poor | No 10mg$28.12/mg at 2mg | 2 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
| Welon Peptide SolutionsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 2.13Poor | $1.96$196.00 for 10 x 10mg pack | 2, 5, 10 | Posted (opens in new tab)BT LabsTier B | 99.6% | In stock | |
| PepVialFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | 1.92Poor | No 10mg$9.80/mg at 5mg | 5 | NoneNo certificate for this product was publicly available at our check | Not shown | No certificate | In stock |
TB-500 vendors by price per mg at 10mg
Lowest first; vendors that do not sell 10mg follow, by their own lowest price per mg. Cheapest is not the same as best: check the certificate and the PSR score beside each price. Back to the PSR score order.
| Vendor | $/mg at 10mg | PSR score | Certificate | Stock |
|---|---|---|---|---|
| Welon Peptide SolutionsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $1.96$196.00 for 10 x 10mg pack | 2.13Poor | Posted (opens in new tab) | In stock |
| Lotus PeptideFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $3.20$32.00 for 10mg | 3.68Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| StudzPeptides | $3.40$33.99 for 10mg | 6.99Fair | Confirmed at lab (opens in new tab) | In stock |
| S1Research | $3.60$36.00 for 10mg | 7.75Strong | Confirmed at lab (opens in new tab) | In stock |
| Pexo LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $3.80$37.99 for 10mg | 3.63Poor | Posted, source not established (opens in new tab) | In stock |
| Amino Club | $4.00$39.99 for 10mg | 8.02Strong | Confirmed at lab (opens in new tab) | In stock |
| Modified AminosFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $4.00$39.99 for 10mg | 6.75Fair | Posted (opens in new tab) | In stock |
| Swiss ChemsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $4.24$42.36 for 10mg | 5.39Weak | Confirmed at lab (opens in new tab) | In stock |
| Transition Biotech | $4.50$44.99 for 10mg | 7.98Strong | Confirmed at lab (opens in new tab) | In stock |
| Vortex Research | $4.50$44.99 for 10mg | 5.50Fair | NoneNo certificate for this product was publicly available at our check | In stock |
| Peptide.ExpressFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $4.50$45.00 for 10mg | 3.76Poor | Posted, source not established (opens in new tab) | In stock |
| AnhydrolabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $4.60$45.95 for 10mg | 2.67Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| Southern Aminos | $4.80$48.00 for 10mg | 8.09Strong | Confirmed at lab (opens in new tab) | Out of stock |
| Drexa LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $4.90$49.00 for 10mg | 3.23Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| Pure Health Peptides | $4.90$49.00 for 10mg | 7.88Strong | Confirmed at lab (opens in new tab) | In stock |
| GhostLabz | $5.00$49.99 for 10mg | 6.14Fair | Confirmed at lab (opens in new tab) | In stock |
| Prism LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $5.00$49.99 for 10mg | 3.92Poor | Posted, source not established (opens in new tab) | In stock |
| Thrive Peptides | $5.00$49.99 for 10mg | 7.45Strong | Confirmed at lab (opens in new tab) | In stock |
| AminoVault | $5.35$53.55 for 10mg | 5.78Fair | Posted (opens in new tab) | In stock |
| Kyreon | $5.40$54.00 for 10mg | 7.29Strong | Confirmed at lab (opens in new tab) | Store not taking orders |
| Profound Aminos | $5.50$55.00 for 10mg | 6.65Fair | Confirmed at lab (opens in new tab) | In stock |
| RapidCore BioFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $5.50$55.00 for 10mg | 3.25Poor | Posted, source not established (opens in new tab) | In stock |
| Peptide Warehouse USFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $5.60$560.00 for 10 x 10mg pack | 2.46Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| Oasis Labs | $5.70$57.00 for 10mg | 7.30Strong | Confirmed at lab (opens in new tab) | In stock |
| NextGen Peps | $5.80$58.00 for 10mg | 5.95Fair | Confirmed at lab (opens in new tab) | In stock |
| Hello Stacks | $5.90$59.00 for 10mg | 6.14Fair | Confirmed at lab (opens in new tab) | In stock |
| Modern Aminos | $5.90$59.00 for 10mg | 7.88Strong | Confirmed at lab (opens in new tab) | In stock |
| Pacific Edge Labs | $6.00$59.95 for 10mg | 7.15Strong | Confirmed at lab (opens in new tab) | In stock |
| Apollo Peptide Sciences | $6.00$59.99 for 10mg | 6.76Fair | Confirmed at lab (opens in new tab) | In stock |
| Bionova Peptides | $6.00$59.99 for 10mg | 6.03Fair | Posted (opens in new tab) | In stock |
| Verified Peptides | $6.20$62.00 for 10mg | 7.67Strong | Confirmed at lab (opens in new tab) | In stock |
| Honest Peptide | $6.30$63.00 for 10mg | 7.42Strong | Confirmed at lab (opens in new tab) | In stock |
| Bluum Peptides | $6.50$65.00 for 10mg | 7.37Strong | Confirmed at lab (opens in new tab) | In stock |
| Prime Peptides | $6.50$65.00 for 10mg | 7.94Strong | Confirmed at lab (opens in new tab) | In stock |
| Research Peptides Lab | $6.50$65.00 for 10mg | 6.14Fair | Confirmed at lab (opens in new tab) | In stock |
| Paramount Peptides | $6.80$68.00 for 10mg | 7.12Strong | Confirmed at lab (opens in new tab) | In stock |
| Ageless PeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $7.00$69.99 for 10mg | 4.30Weak | Posted (opens in new tab) | In stock |
| FRO Peptides | $7.00$69.99 for 10mg | 6.50Fair | Confirmed at lab (opens in new tab) | In stock |
| Prime Peptide Solutions | $7.00$69.99 for 10mg | 7.14Strong | Posted (opens in new tab) | In stock |
| Felix Chemical Supply | $7.00$70.00 for 10mg | 7.51Strong | Confirmed at lab (opens in new tab) | In stock |
| Peptides Source | $7.00$70.00 for 10mg | 7.17Strong | Confirmed at lab (opens in new tab) | In stock |
| Redline Bio LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $7.00$70.00 for 10mg | 4.80Weak | Posted (opens in new tab) | In stock |
| NuScience Peptides | $7.50$74.99 for 10mg | 6.43Fair | Confirmed at lab (opens in new tab) | In stock |
| Rogue Compounds | $7.50$74.99 for 10mg | 6.88Fair | Confirmed at lab (opens in new tab) | In stock |
| Ameano Peptides | $7.50$75.00 for 10mg | 7.80Strong | Confirmed at lab (opens in new tab) | In stock |
| VERATIS | $7.50$75.00 for 10mg | 7.21Strong | Confirmed at lab (opens in new tab) | In stock |
| Peptide Pro | $7.57$75.65 for 10mg | 5.60Fair | Posted, differs from lab copy (opens in new tab) | In stock |
| PSPeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $8.00$79.99 for 10mg | 3.95Poor | Posted, source not established (opens in new tab) | In stock |
| VoriLabs | $8.00$79.99 for 10mg | 6.87Fair | Confirmed at lab (opens in new tab) | In stock |
| Amino USA | $8.00$80.00 for 10mg | 7.78Strong | Confirmed at lab (opens in new tab) | In stock |
| NuuVive Peptides | $8.30$83.00 for 10mg | 6.93Fair | Confirmed at lab (opens in new tab) | In stock |
| BulkGLP | $8.40$84.00 for 10mg | 6.49Fair | Confirmed at lab (opens in new tab) | In stock |
| JD BioWorks | $8.50$84.95 for 10mg | 6.34Fair | Confirmed at lab (opens in new tab) | In stock |
| Peptide WarehouseFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $8.50$84.99 for 10mg | 5.01Weak | Posted, source not established (opens in new tab) | In stock |
| Protide Health | $8.50$85.00 for 10mg | 7.67Strong | Confirmed at lab (opens in new tab) | In stock |
| Azyrion Labs | $8.90$89.00 for 10mg | 5.45Weak | Confirmed at lab (opens in new tab) | In stock |
| OMNI Peptides | $9.00$89.99 for 10mg | 6.08Fair | Confirmed at lab (opens in new tab) | In stock |
| Peptide LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $9.00$89.99 for 10mg | 3.77Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| BioInfinityFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $9.50$95.00 for 10mg | 3.70Poor | Posted, source not established (opens in new tab) | In stock |
| Zeptix Labs | $9.50$95.00 for 10mg | 8.17Strong | Confirmed at lab (opens in new tab) | In stock |
| Direct Peptides | $9.90$99.00 for 10mg | 7.43Strong | Confirmed at lab (opens in new tab) | In stock |
| Peptyes | $10.20$102.00 for 10mg | 6.55Fair | Confirmed at lab (opens in new tab) | In stock |
| Nextday PeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $11.00$110.00 for 10mg | 3.27Poor | Confirmed at lab (opens in new tab) | In stock |
| Biotech Peptides | $12.40$124.00 for 10mg | 5.79Fair | Confirmed at lab (opens in new tab) | In stock |
| Cernum Biosciences | $13.00$129.99 for 10mg | 4.50Weak | Confirmed at lab (opens in new tab) | In stock |
| Limitless Biotech | $13.40$133.99 for 10mg | 6.97Fair | Confirmed at lab (opens in new tab) | In stock |
| Vyal LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $13.90$139.00 for 10mg | 4.70Weak | NoneNo certificate for this product was publicly available at our check | In stock |
| Based ResearchFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $14.00$140.00 for 10mg | 4.54Weak | Posted (opens in new tab) | In stock |
| Core Peptides | $14.00$140.00 for 10mg | 6.54Fair | Confirmed at lab (opens in new tab) | In stock |
| Raw Amino | $15.20$152.00 for 10mg | 5.70Fair | Confirmed at lab (opens in new tab) | In stock |
| BioLongevity Labs | $16.50$164.97 for 10mg | 7.24Strong | Posted (opens in new tab) | In stock |
| Peptara LabsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $22.00$220.00 for 10mg | 2.38Poor | Posted, source not established (opens in new tab) | In stock |
| Spartan PeptidesFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | $33.50$335.00 for 10mg | 3.38Poor | Confirmed at lab (opens in new tab) | In stock |
| Snowman ResearchFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$7.00/mg at 5mg | 3.06Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| Arctic Lab Supply | No 10mg$7.60/mg at 5mg | 6.98Fair | Confirmed at lab (opens in new tab) | In stock |
| Amino AmigosFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$7.80/mg at 5mg | 5.62Fair | Confirmed at lab (opens in new tab) | In stock |
| Loti Labs | No 10mg$9.00/mg at 5mg | 7.68Strong | Confirmed at lab (opens in new tab) | In stock |
| PepVialFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$9.80/mg at 5mg | 1.92Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| Pinnacle Peptide Labs | No 10mg$10.00/mg at 5mg | 6.44Fair | Confirmed at lab (opens in new tab) | In stock |
| Ascension Peptides | No 10mg$10.80/mg at 5mg | 7.55Strong | Confirmed at lab (opens in new tab) | In stock |
| CuroFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$10.80/mg at 5mg | 6.27Fair | Posted (opens in new tab) | In stock |
| Sports Technology Labs | No 10mg$14.00/mg at 5mg | 6.88Fair | Confirmed at lab (opens in new tab) | In stock |
| Delix Labs | No 10mg$14.00/mg at 5mg | 4.58Weak | Confirmed at lab (opens in new tab) | In stock |
| GenX BioFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$16.50/mg at 2mg | 4.45Weak | Posted (opens in new tab) | In stock |
| Peptide ProsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$18.63/mg at 2mg | 3.62Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| PepBioticsFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No 10mg$28.12/mg at 2mg | 2.23Poor | NoneNo certificate for this product was publicly available at our check | In stock |
| Stack ResearchFails testing gateThird-party testing not established. The gate records what we could verify; it is not a finding of a quality or safety problem. | No price listed | 2.51Poor | Posted, differs from lab copy (opens in new tab) | No price listed |
Affiliate partners carrying TB-500
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
Highest-placed partner
Limitless Biotech9.5/10 certificate
The highest-placed affiliate partner in the table above for TB-500: certificate 9.5/10, vendor score 6.97/10.
Limitless Biotech discount code →Largest partner reader code
Ascension Peptides50% off
The largest reader discount among our affiliate partners carrying TB-500: 50% off with code PSR50.
Ascension Peptides discount code →TB-500: Frequently Asked Questions
Who has the best TB-500?
In our 2026 audit, Southern Aminos is listed first for TB-500: its certificate for TB-500 scores 9.5/10 on our lab rule, and its published vendor score is 8.09/10. The full ordered table is on this page.
What is the cheapest TB-500 per mg?
The lowest recorded price per milligram for TB-500 in our audit is the "Best $/mg" figure at the top of this page, and every carrier's price per mg is in the table. Cheapest is not the same as best: the table is ordered by certificate and vendor score, not by price.
How do you rate TB-500 vendors?
Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. The certificate score is the same lab rule that builds each vendor's lab sub-score, applied to that vendor's certificate for TB-500; the vendor score is the published overall score. Price per mg is shown but does not change the order. See our methodology for the lab rule.