Best sources ranked · 2026

Best GHK-Cu Sources

92 US vendors carry GHK-Cu. Ordered below by the lab-rule score of each vendor’s certificate for GHK-Cu, then by the vendor’s published score; prices are per milligram. Copper-binding tripeptide (glycyl-histidyl-lysine complexed with copper) that occurs naturally in human plasma. Sold for laboratory research use only.

Vendors
92

Vendors

With COAs
76

With COAs

Best $/mg
$0.07

Best $/mg

Looking for the top picks? Best GHK-Cu vendors, ranked by PSR score →

New to GHK-Cu? What is GHK-Cu? Our plain-English, research-use-only guide: what it is and how to spot a verified source.GHK-Cu research guide →

Every GHK-Cu 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.

10.0/103 base, +2 MDx BioAnalytical Laboratory tier A+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +1 accredited, +0.5 purity 99.77certificate

Vendor score 7.24/10Strong

Price per mg
$1.70
Best price
$84.97 / 50mg
Shop BioLongevity Labs → (opens in new tab)
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 99.86certificate

Vendor score 8.17/10Strong

Price per mg
$0.40
Best price
$39.99 / 50mg
Shop Zeptix Labs → (opens in new tab)
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 99.88certificate

Vendor score 8.09/10Strong

Price per mg
$0.40
Best price
$40.00 / 100mg
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 99.94certificate

Vendor score 8.02/10Strong

Price per mg
$0.58
Best price
$57.99 / 100mg
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 99.851certificate

Vendor score 7.98/10Strong

Price per mg
$0.30
Best price
$29.99 / 100mg
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 7.88/10Strong

Price per mg
$0.64
Best price
$64.00 / 100mg
9.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.81certificate

Vendor score 7.80/10Strong

Price per mg
$0.53
Best price
$53.00 / 100mg
Shop Ameano Peptides → (opens in new tab)
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 99.92certificate

Vendor score 7.75/10Strong

Price per mg
$0.31
Best price
$25.00 / 80mg
9.5/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.739certificate

Vendor score 7.12/10Strong

Price per mg
$0.75
Best price
$75.00 / 100mg
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 99.701certificate

Vendor score 6.97/10Fair

Price per mg
$0.43
Best price
$85.99 / 200mg
Shop Limitless Biotech → (opens in new tab)
Show 82 more carriers
9.5/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.815certificate

Vendor score 6.50/10Fair

Price per mg
$0.80
Best price
$39.99 / 50mg
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.782certificate

Vendor score 7.94/10Strong

Price per mg
$0.60
Best price
$60.00 / 100mg
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
$1.00
Best price
$49.99 / 50mg
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 99.23certificate

Vendor score 7.67/10Strong

Price per mg
$0.65
Best price
$65.00 / 100mg
9.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.825certificate

Vendor score 7.67/10Strong

Price per mg
$0.50
Best price
$49.99 / 100mg
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.226certificate

Vendor score 7.55/10Strong

Price per mg
$0.59
Best price
$59.00 / 100mg
Shop Ascension Peptides → (opens in new tab)
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 7.51/10Strong

Price per mg
$0.60
Best price
$59.99 / 100mg
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 99.64certificate

Vendor score 7.21/10Strong

Price per mg
$1.20
Best price
$60.00 / 50mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.73certificate

Vendor score 6.98/10Fair

Price per mg
$0.55
Best price
$54.99 / 100mg
Shop Arctic Lab Supply → (opens in new tab)
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.85certificate

Vendor score 6.87/10Fair

Price per mg
$0.49
Best price
$48.99 / 100mg
9.0/103 base, +2 Chromate tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.519certificate

Vendor score 6.65/10Fair

Price per mg
$0.65
Best price
$65.00 / 100mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.804certificate

Vendor score 6.50/10Fair

Price per mg
$0.69
Best price
$69.00 / 100mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 sterility, +0.5 purity 99.92certificate

Vendor score 6.43/10Fair

Price per mg
$0.80
Best price
$79.99 / 100mg
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
$0.69
Best price
$69.00 / 100mg
Shop Hello Stacks → (opens in new tab)
9.0/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.73certificate

Vendor score 5.95/10Fair

Price per mg
$0.59
Best price
$59.00 / 100mg
Shop NextGen Peps → (opens in new tab)
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.88certificate

Vendor score 8.01/10Strong

Price per mg
$0.53
Best price
$53.00 / 100mg
Shop DAAVY Research → (opens in new tab)
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.87certificate

Vendor score 7.90/10Strong

Price per mg
$0.50
Best price
$25.00 / 50mg
Shop Luv Aminos → (opens in new tab)
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
$0.49
Best price
$49.00 / 100mg
8.5/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.714certificate

Vendor score 7.73/10Strong

Price per mg
$0.59
Best price
$59.00 / 100mg
Shop LabFirst Peptides → (opens in new tab)
8.5/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.647certificate

Vendor score 7.45/10Strong

Price per mg
$0.55
Best price
$54.99 / 100mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.97certificate

Vendor score 7.45/10Strong

Price per mg
$0.42
Best price
$44.99 / 107mg
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.51certificate

Vendor score 7.43/10Strong

Price per mg
$0.98
Best price
$49.00 / 50mg
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin (separate report), 0 purity 99.68certificate

Vendor score 7.37/10Strong

Price per mg
$0.59
Best price
$59.00 / 100mg
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.86certificate

Vendor score 7.30/10Strong

Price per mg
$0.59
Best price
$59.00 / 100mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.84certificate

Vendor score 7.29/10Strong

Price per mg
$0.49
Best price
$49.00 / 100mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.74certificate

Vendor score 7.17/10Strong

Price per mg
$0.70
Best price
$70.00 / 100mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.75certificate

Vendor score 7.15/10Strong

Price per mg
$0.68
Best price
$67.95 / 100mg
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.959certificate

Vendor score 6.93/10Fair

Price per mg
$0.77
Best price
$77.00 / 100mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.88certificate

Vendor score 6.89/10Fair

Price per mg
$0.45
Best price
$45.00 / 100mg
Shop NovaForge Labs → (opens in new tab)
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

Price per mg
$0.90
Best price
$44.99 / 50mg
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.62certificate

Vendor score 6.55/10Fair

Price per mg
$0.48
Best price
$48.00 / 100mg
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
$1.16
Best price
$58.00 / 50mg
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.93certificate

Vendor score 5.78/10Fair

Price per mg
$0.66
Best price
$66.30 / 100mg
Shop AminoVault → (opens in new tab)
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.88certificate

Vendor score 5.60/10Fair

Price per mg
$1.27
Best price
$63.75 / 50mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.85certificate

Vendor score 5.50/10Fair

Price per mg
$0.50
Best price
$49.99 / 100mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.7certificate

Vendor score 5.39/10Weak

Price per mg
$1.38
Best price
$68.95 / 50mg
Shop Swiss Chems → (opens in new tab)
8.5/103 base, +2 AV Analytics tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.82certificate

Vendor score 4.80/10Weak

Price per mg
$0.60
Best price
$60.00 / 100mg
8.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.827certificate

Vendor score 4.58/10Weak

Price per mg
$1.00
Best price
$100.00 / 100mg
8.5/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.761certificate

Vendor score 3.68/10Poor

Price per mg
$0.25
Best price
$25.00 / 100mg
8.5/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.77certificate

Vendor score 3.38/10Poor

Price per mg
$3.58
Best price
$179.00 / 50mg
8.0/103 base, +2 BioRegen tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.67certificate

Vendor score 7.78/10Strong

Price per mg
$0.50
Best price
$50.00 / 100mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.33certificate

Vendor score 7.42/10Strong

Price per mg
$0.39
Best price
$39.20 / 100mg
Shop Honest Peptide → (opens in new tab)
8.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, 0 purity 99.311certificate

Vendor score 7.14/10Strong

Price per mg
$0.60
Best price
$59.99 / 100mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.03certificate

Vendor score 6.99/10Fair

Price per mg
$0.27
Best price
$26.99 / 100mg
8.0/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.4certificate

Vendor score 6.88/10Fair

Price per mg
$1.20
Best price
$59.99 / 50mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.574certificate

Vendor score 6.76/10Fair

Price per mg
$1.00
Best price
$50.00 / 50mg
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, no purity figurecertificate

Vendor score 6.34/10Fair

Price per mg
$0.65
Best price
$64.95 / 100mg
Shop JD BioWorks → (opens in new tab)
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.6certificate

Vendor score 6.26/10Fair

Price per mg
$1.00
Best price
$49.99 / 50mg
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.6certificate

Vendor score 6.14/10Fair

Price per mg
$0.60
Best price
$59.99 / 100mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.18certificate

Vendor score 6.14/10Fair

Price per mg
$0.95
Best price
$95.00 / 100mg
8.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.362certificate

Vendor score 6.08/10Fair

Price per mg
$0.80
Best price
$79.99 / 100mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.15certificate

Vendor score 6.03/10Fair

Price per mg
$0.70
Best price
$35.00 / 50mg
8.0/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.64certificate

Vendor score 5.79/10Fair

Price per mg
$1.28
Best price
$64.00 / 50mg
8.0/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.64certificate

Vendor score 5.70/10Fair

Price per mg
$0.92
Best price
$184.00 / 200mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.07certificate

Vendor score 5.45/10Weak

Price per mg
$0.69
Best price
$68.95 / 100mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.621certificate

Vendor score 4.50/10Weak

Price per mg
$0.60
Best price
$59.99 / 100mg
8.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, 0 purity 99.679certificate

Vendor score 3.77/10Poor

Price per mg
$0.80
Best price
$79.99 / 100mg
7.5/103 base, +2 Krause Analytical LLC tier B-, +1.5 key, +0.5 endotoxin, +0.5 purity 99.9certificate

Vendor score 3.27/10Poor

Price per mg
$1.10
Best price
$110.00 / 100mg
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
$0.40
Best price
$39.99 / 100mg
Shop Modified Aminos → (opens in new tab)
5.5/103 base, +2 Accurate Test Lab tier B-, +0.5 purity 99.94certificate

Vendor score 4.70/10Weak

Price per mg
$0.99
Best price
$99.00 / 100mg
4.5/103 base, +0 Analytical Formulations tier C, +1.5 key, 0 purity 99.5certificate

Vendor score 4.54/10Weak

Price per mg
$0.90
Best price
$90.00 / 100mg
3.5/103 base, +2 MZ Biolabs tier A, -1.5 purity 98.9certificate

Vendor score 4.45/10Weak

Price per mg
$1.00
Best price
$50.00 / 50mg
3.0/103 base, +0 Analiza Białek tier C, +1.5 key, -1.5 purity 98certificate

Vendor score 5.62/10Fair

Price per mg
$0.65
Best price
$65.00 / 100mg
2.0/10no laboratory named on the certificate = 2.0 flatcertificate

Vendor score 5.01/10Weak

Price per mg
$0.90
Best price
$89.99 / 100mg
2.0/10North American Diagnostics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.95/10Poor

Price per mg
$0.45
Best price
$44.99 / 100mg
2.0/10Proof Point Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 3.92/10Poor

Price per mg
$0.60
Best price
$59.99 / 100mg
2.0/10Mistral Diagnostics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.76/10Poor

Price per mg
$0.60
Best price
$60.00 / 100mg
2.0/10Verum Analytics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.70/10Poor

Price per mg
$1.00
Best price
$50.00 / 50mg
Shop BioInfinity → (opens in new tab)
2.0/10Amino Metrics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.63/10Poor

Price per mg
$0.50
Best price
$49.99 / 100mg
2.0/10self-issued by the vendor = 2.0 flatcertificate

Vendor score 3.25/10Poor

Price per mg
$1.00
Best price
$50.00 / 50mg
2.0/10Titreon Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 2.38/10Poor

Price per mg
$2.00
Best price
$200.00 / 100mg
0.0/10no certificatecertificate

Vendor score 6.44/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.80
Best price
$79.99 / 100mg
Shop Pinnacle Peptide Labs → (opens in new tab)
0.0/10no certificatecertificate

Vendor score 4.30/10Weak

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.80
Best price
$39.99 / 50mg
0.0/10no certificatecertificate

Vendor score 3.62/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.99
Best price
$49.50 / 50mg
0.0/10no certificatecertificate

Vendor score 3.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.45
Best price
$45.00 / 100mg
0.0/10no certificatecertificate

Vendor score 3.06/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.70
Best price
$35.00 / 50mg
0.0/10no certificatecertificate

Vendor score 2.67/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.45
Best price
$44.95 / 100mg
0.0/10posted copy differs from the lab's copy = 0certificate

Vendor score 2.51/10Poor

Price per mg
$1.30
Best price
$64.90 / 50mg
0.0/10no certificatecertificate

Vendor score 2.46/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.37
Best price
$370.00 / 10 x 100mg pack
0.0/10no certificatecertificate

Vendor score 2.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$1.57
Best price
$78.74 / 50mg
0.0/10certificate prints a failed result = 0certificate

Vendor score 2.13/10Poor

Price per mg
$0.07
Best price
$68.00 / 10 x 100mg pack
0.0/10no certificatecertificate

Vendor score 1.63/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.54
Best price
$53.99 / 100mg

“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 GHK-Cu

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

Highest-placed partner

BioLongevity Labs10.0/10 certificate

The highest-placed affiliate partner in the table above for GHK-Cu: certificate 10.0/10, vendor score 7.24/10.

Shop BioLongevity Labs → (opens in new tab)
BioLongevity Labs discount code →

Largest partner reader code

The largest reader discount among our affiliate partners carrying GHK-Cu: 50% off with code PSR50.

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

GHK-Cu: Frequently Asked Questions

Who has the best GHK-Cu?

In our 2026 audit, BioLongevity Labs is listed first for GHK-Cu: its certificate for GHK-Cu scores 10.0/10 on our lab rule, and its published vendor score is 7.24/10. The full ordered table is on this page.

What is the cheapest GHK-Cu per mg?

The lowest recorded price per milligram for GHK-Cu 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 GHK-Cu 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 GHK-Cu; 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.

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