Best GHK-Cu Vendors
92 vendors we track carry GHK-Cu. The 63 that pass our testing gate are ranked below by PSR score, with the certificate each one posts for GHK-Cu, a price matched at 50mg and any reader code. For laboratory research use only.
- Carry it
- 92
Carry it
- Pass testing gate
- 63
Pass testing gate
- Lab-confirmed COAs
- 71
Lab-confirmed COAs
Want every carrier ordered by its GHK-Cu certificate instead, with sizes and stock? See the full GHK-Cu comparison. How a score is built: How we rate. How to check a certificate yourself: how to read a peptide COA.
Top 3 GHK-Cu vendors by PSR score
The highest PSR scores among open stores that carry GHK-Cu and pass our testing gate. Affiliate status plays no part in this list.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
#1 by PSR score
Zeptix Labs8.17Strong- Certificate
- Verified (opens in new tab)
- Lab
- Freedom Diagnostics TestingTier A
- Purity
- 99.86%
- Tested
- Price
- $0.40/mg ($39.99 for 50mg)
#2 by PSR score
Southern Aminos8.09Strong- Certificate
- Verified (opens in new tab)
- Lab
- ILS LaboratoriesTier B+
- Purity
- 99.88%
- Tested
- Price
- No 50mg
#3 by PSR score
Amino Club8.02Strong- Certificate
- Verified (opens in new tab)
- Lab
- ILS LaboratoriesTier B+
- Purity
- 99.94%
- Tested
- Price
- $0.60/mg ($29.99 for 50mg)
Best GHK-Cu vendors with a reader discount
Affiliate partners that pass the testing gate and give readers a code that applies to GHK-Cu, in PSR score order. This block is a convenience only: the ranking below is the same with or without it.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
- Zeptix Labs8.17Strong
- DAAVY Research8.01Strong
- Luv Aminos7.90Strong
- Ameano Peptides7.80Strong
- LabFirst Peptides7.73Strong
- Ascension Peptides7.55Strong
- Honest Peptide7.42Strong
- BioLongevity Labs7.24Strong
- Arctic Lab Supply6.98Fair
- Limitless Biotech6.97Fair
- NovaForge Labs6.89Fair
- Pinnacle Peptide Labs6.44FairNoneNo third-party COA was publicly available at audit time
- JD BioWorks6.34Fair
- Hello Stacks6.14Fair
- NextGen Peps5.95Fair
- AminoVault5.78Fair
Every GHK-Cu vendor that passes the gate, by PSR score
63 vendors, highest PSR score first; equal scores are listed alphabetically. Price per mg is matched at 50mg, the size most carriers sell, so vials compare like for like. The certificate column is the vendor’s certificate for GHK-Cu only. Affiliate status never affects the order (how we keep it separate).
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
Listed separately: 29 vendors outside the ranking
These carry GHK-Cu but do not meet our testing gate, so they are never placed in the ranking above, whatever their score. The gate records what we could verify; it is not a finding of a quality or safety problem.
Show 29 vendors that fail the testing gate
Best GHK-Cu vendors: frequently asked questions
Who is the best GHK-Cu vendor?
By PSR score, Zeptix Labs is the highest-rated open store carrying GHK-Cu that passes our testing gate (8.17/10, Strong). Southern Aminos (8.09) and Amino Club (8.02) follow. The certificate each of them posts for GHK-Cu is shown beside the score, so a reader can check it before buying.
Where can I buy GHK-Cu with a discount code?
16 affiliate partners carrying GHK-Cu pass our testing gate and give readers a code that applies to it. The highest rated is Zeptix Labs (code PSR20, 20% off). We may earn a commission on those links; it never changes a score or a rank.
How are these GHK-Cu vendors ranked?
By PSR score, the published vendor score out of 10, built from lab testing, certificate verification, pricing, shipping, operating history and reviews under the rules on How We Rate. Equal scores are listed alphabetically. Price per mg and the certificate for GHK-Cu are shown but do not change the order, and affiliate status never does.
Why are some GHK-Cu vendors listed separately?
29 vendors carrying GHK-Cu do not meet our testing gate: third-party testing could not be established or independently verified. They are listed below the ranking rather than in it. The gate records what we could verify; it is not a finding of a quality or safety problem.
How do I check a GHK-Cu certificate of analysis?
Open the certificate from the vendor's row, confirm it names GHK-Cu and a batch, then look up the verification key on the testing laboratory's own site. 71 of the 92 GHK-Cu certificates we track were confirmed at the lab. Our guide on how to read a peptide COA walks through each field. For laboratory research use only.