Best sources ranked · 2026

Best SS-31 Sources

43 US vendors carry SS-31. Ordered below by the lab-rule score of each vendor’s certificate for SS-31, then by the vendor’s published score; prices are per milligram. A synthetic mitochondria-targeting tetrapeptide (elamipretide) that binds cardiolipin. Sold for laboratory research use only.

Reviewed by the Peptide Source Review teamLast audited How we rate

Vendors
43

Vendors

With COAs
27

With COAs

Best $/mg
$1.04

Best $/mg

Every SS-31 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.

1Southern Aminos
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 99.85certificate

Vendor score 8.09/10Strong

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$5.52
Best price
$55.20 / 10mg
Shop Southern Aminos → (opens in new tab)
2S1Research
9.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.89certificate

Vendor score 7.75/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$1.66
Best price
$83.00 / 50mg
Shop S1Research → (opens in new tab)
3Ascension Peptides
9.5/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.886certificate

Vendor score 7.55/10Strong

Verified (opens in new tab)Kovera LabsTier A-
Price per mg
$8.00
Best price
$79.99 / 10mg
Shop Ascension Peptides → (opens in new tab)
4Bluum Peptides
9.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.88certificate

Vendor score 7.37/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$2.18
Best price
$109.00 / 50mg
Shop Bluum Peptides → (opens in new tab)
5StudzPeptides
9.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.9certificate

Vendor score 6.99/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$1.52
Best price
$75.99 / 50mg
Shop StudzPeptides → (opens in new tab)
6VoriLabs
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.81certificate

Vendor score 6.87/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$3.14
Best price
$156.99 / 50mg
Shop VoriLabs → (opens in new tab)
7Nextday Peptides
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.72certificate

Vendor score 3.27/10Poor

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$3.95
Best price
$197.50 / 50mg
Shop Nextday Peptides → (opens in new tab)
8LabFirst Peptides
8.5/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.736certificate

Vendor score 7.73/10Strong

Verified (opens in new tab)Kovera LabsTier A-
Price per mg
$4.18
Best price
$209.00 / 50mg
Shop LabFirst Peptides → (opens in new tab)
9Direct Peptides
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.41certificate

Vendor score 7.43/10Strong

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$6.90
Best price
$69.00 / 10mg
Shop Direct Peptides → (opens in new tab)
10Pacific Edge Labs
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.87certificate

Vendor score 7.15/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$3.30
Best price
$164.95 / 50mg
Shop Pacific Edge Labs → (opens in new tab)
Show 33 more carriers
11NuuVive Peptides
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.756certificate

Vendor score 6.93/10Fair

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$5.20
Best price
$260.00 / 50mg
Shop NuuVive Peptides → (opens in new tab)
12NovaForge Labs
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.89certificate

Vendor score 6.89/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$4.00
Best price
$40.00 / 10mg
Shop NovaForge Labs → (opens in new tab)
13Rogue Compounds
8.5/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.8certificate

Vendor score 6.88/10Fair

Verified (opens in new tab)Vanguard LaboratoryTier B+
Price per mg
$8.50
Best price
$84.99 / 10mg
Shop Rogue Compounds → (opens in new tab)
14Peptyes
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.48certificate

Vendor score 6.55/10Fair

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$8.40
Best price
$84.00 / 10mg
Shop Peptyes → (opens in new tab)
15Hacker Peptides
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.729certificate

Vendor score 6.32/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$2.44
Best price
$24.42 / 10mg
Shop Hacker Peptides → (opens in new tab)
16NextGen Peps
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.941certificate

Vendor score 5.95/10Fair

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$6.30
Best price
$63.00 / 10mg
Shop NextGen Peps → (opens in new tab)
17AminoVault
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.63certificate

Vendor score 5.78/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$3.64
Best price
$181.90 / 50mg
Shop AminoVault → (opens in new tab)
18Peptide Pro
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.8certificate

Vendor score 5.60/10Fair

Verified (opens in new tab)BioviridianTier A-
Price per mg
$5.95
Best price
$59.49 / 10mg
Shop Peptide Pro → (opens in new tab)
19GenX Bio
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.86certificate

Vendor score 4.45/10Weak

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$1.78
Best price
$89.00 / 50mg
Shop GenX Bio → (opens in new tab)
20Kyreon
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.5certificate

Vendor score 7.29/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$5.90
Best price
$59.00 / 10mg
21NextSelf Labs
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.57certificate

Vendor score 6.26/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$3.00
Best price
$149.99 / 50mg
Shop NextSelf Labs → (opens in new tab)
22GhostLabz
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.57certificate

Vendor score 6.14/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$4.50
Best price
$44.99 / 10mg
Shop GhostLabz → (opens in new tab)
23Lotus Peptide
8.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, 0 purity 99.573certificate

Vendor score 3.68/10Poor

Verified (opens in new tab)Kovera LabsTier A-
Price per mg
$3.00
Best price
$30.00 / 10mg
Shop Lotus Peptide → (opens in new tab)
24Prime Peptide Solutions
7.0/103 base, +2 BT Labs tier B, +1.5 key, +0.5 purity 99.7certificate

Vendor score 7.14/10Strong

View (opens in new tab)BT LabsTier B
Price per mg
$6.00
Best price
$59.99 / 10mg
Shop Prime Peptide Solutions → (opens in new tab)
25Azyrion Labs
6.5/103 base, +2 ACS Laboratory tier A, +1.5 key, +1.5 key confirmed, -1.5 purity 98.31certificate

Vendor score 5.45/10Weak

Verified (opens in new tab)ACS LaboratoryTier A
Price per mg
$8.20
Best price
$82.00 / 10mg
Shop Azyrion Labs → (opens in new tab)
26Based Research
4.5/103 base, +0 Analytical Formulations tier C, +1.5 key, 0 purity 99.5certificate

Vendor score 4.54/10Weak

View (opens in new tab)Analytical FormulationsTier C
Price per mg
$5.20
Best price
$260.00 / 50mg
Shop Based Research → (opens in new tab)
27Redline Bio Labs
2.0/10SteriGenix Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 4.80/10Weak

Vendor report (lab not established) (opens in new tab)SteriGenix AnalyticalTier D
Price per mg
$2.72
Best price
$136.00 / 50mg
Shop Redline Bio Labs → (opens in new tab)
28Prism Labs
2.0/10Proof Point Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 3.92/10Poor

Vendor report (lab not established) (opens in new tab)Proof Point AnalyticalTier D
Price per mg
$4.50
Best price
$44.99 / 10mg
Shop Prism Labs → (opens in new tab)
29Pexo Labs
2.0/10Amino Metrics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.63/10Poor

Vendor report (lab not established) (opens in new tab)Amino MetricsTier D
Price per mg
$4.50
Best price
$44.99 / 10mg
Shop Pexo Labs → (opens in new tab)
30RapidCore Bio
2.0/10self-issued by the vendor = 2.0 flatcertificate

Vendor score 3.25/10Poor

Vendor-issued (opens in new tab)
Price per mg
$3.60
Best price
$180.00 / 50mg
Shop RapidCore Bio → (opens in new tab)
31Peptara Labs
2.0/10Titreon Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 2.38/10Poor

Vendor report (lab not established) (opens in new tab)Titreon AnalyticalTier D
Price per mg
$12.00
Best price
$120.00 / 10mg
Shop Peptara Labs → (opens in new tab)
32Arctic Lab Supply
0.0/10no certificatecertificate

Vendor score 6.98/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
—
Best price
—
Shop Arctic Lab Supply → (opens in new tab)
33Hello Stacks
0.0/10no certificatecertificate

Vendor score 6.14/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.90
Best price
$49.00 / 10mg
Shop Hello Stacks → (opens in new tab)
34Vortex Research
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
Shop Vortex Research → (opens in new tab)
35Delix Labs
0.0/10no certificatecertificate

Vendor score 4.58/10Weak

NoneNo third-party COA was publicly available at audit time
Price per mg
$8.30
Best price
$83.00 / 10mg
Shop Delix Labs → (opens in new tab)
36Ageless Peptides
0.0/10no certificatecertificate

Vendor score 4.30/10Weak

NoneNo third-party COA was publicly available at audit time
Price per mg
$6.00
Best price
$59.99 / 10mg
Shop Ageless Peptides → (opens in new tab)
37Peptide.Express
0.0/10no certificatecertificate

Vendor score 3.76/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.00
Best price
$200.00 / 50mg
Shop Peptide.Express → (opens in new tab)
38Drexa Labs
0.0/10no certificatecertificate

Vendor score 3.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$2.18
Best price
$109.00 / 50mg
Shop Drexa Labs → (opens in new tab)
39YourFitnessPeptides
0.0/10no certificatecertificate

Vendor score 2.75/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$3.62
Best price
$180.96 / 50mg
Shop YourFitnessPeptides → (opens in new tab)
40Peptide Warehouse US
0.0/10no certificatecertificate

Vendor score 2.46/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.90
Best price
$490.00 / 10 x 10mg pack
Shop Peptide Warehouse US → (opens in new tab)
41PepBiotics
0.0/10no certificatecertificate

Vendor score 2.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$11.47
Best price
$114.75 / 10mg
Shop PepBiotics → (opens in new tab)
42Welon Peptide Solutions
0.0/10no certificatecertificate

Vendor score 2.13/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$1.04
Best price
$518.00 / 10 x 50mg pack
Shop Welon Peptide Solutions → (opens in new tab)
43Medura Peptides
0.0/10no certificatecertificate

Vendor score 1.63/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$5.40
Best price
$269.99 / 50mg
Shop Medura Peptides → (opens in new tab)

“Shop” links may be affiliate links (rel="sponsored"); we may earn a commission. Affiliate status never affects any rating, rank, or gate. Disclosure.

Affiliate partners carrying SS-31

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

Top partner pick

Ascension Peptides9.5/10 certificate · 50% off

The highest-placed affiliate partner in the table above for SS-31 (certificate 9.5/10, vendor score 7.55/10), and also the partner with the largest reader code on it (code PSR50).

Shop Ascension Peptides → (opens in new tab)
Ascension Peptides discount code →

SS-31: Frequently Asked Questions

Who has the best SS-31?

In our 2026 audit, Southern Aminos is listed first for SS-31: its certificate for SS-31 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 SS-31 per mg?

The lowest recorded price per milligram for SS-31 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 SS-31 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 SS-31; 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.

Also available at these peptide pages

MOTS-cTesamorelinGHK-CuNAD+

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