Best Cortagen Vendors
9 vendors we track carry Cortagen. The 7 that pass our testing gate are ranked below by PSR score, with the certificate each one posts for Cortagen, a price matched at 20mg and any reader code. For laboratory research use only.
- Carry it
- 9
Carry it
- Pass testing gate
- 7
Pass testing gate
- Lab-confirmed COAs
- 4
Lab-confirmed COAs
Want every carrier ordered by its Cortagen certificate instead, with sizes and stock? See the full Cortagen comparison. How a score is built: How we rate. How to check a certificate yourself: how to read a peptide COA.
Top 3 Cortagen vendors by PSR score
The highest PSR scores among open stores that carry Cortagen 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
Pure Health Peptides7.88Strong- Certificate
- Verified (opens in new tab)
- Lab
- Ethos Analytics LaboratoryTier B+
- Purity
- 99%
- Tested
- Price
- $2.45/mg ($49.00 for 20mg)
#2 by PSR score
Amino USA7.61Strong- Certificate
- Verified (opens in new tab)
- Lab
- BioRegenTier A
- Purity
- 99.75%
- Tested
- Price
- $2.75/mg ($55.00 for 20mg)
#3 by PSR score
BioLongevity Labs7.35Strong- Certificate
- View COA (key not found at lab) (opens in new tab)
- Lab
- MDx BioAnalytical LaboratoryTier A+
- Purity
- 99.8%
- Tested
- (first seen)
- Price
- $3.50/mg ($69.97 for 20mg)
Best Cortagen vendors with a reader discount
Affiliate partners that pass the testing gate and give readers a code that applies to Cortagen, 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.
- BioLongevity Labs7.35Strong
- NextGen Peps5.96FairNoneNo third-party COA was publicly available at audit time
Every Cortagen vendor that passes the gate, by PSR score
7 vendors, highest PSR score first; equal scores are listed alphabetically. Price per mg is matched at 20mg, the size most carriers sell, so vials compare like for like. The certificate column is the vendor’s certificate for Cortagen 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.
| # | Vendor | PSR score | Cortagen certificate | $/mg at 20mg | Reader code | Links |
|---|---|---|---|---|---|---|
| 1 | Pure Health Peptides | 7.88Strong | Verified (opens in new tab) | $2.45/mg | Shop → | |
| 2 | Amino USA | 7.61Strong | Verified (opens in new tab) | $2.75/mg | Shop → | |
| 3 | BioLongevity Labs | 7.35Strong | View (key not found) (opens in new tab) | $3.50/mg | Shop → | |
| 4 | Core Peptides | 6.65Fair | Verified (opens in new tab) | $2.95/mg | Shop → | |
| 5 | Research Market | 6.42Fair | Verified (opens in new tab) | $3.25/mg | Shop → | |
| 6 | NextGen Peps | 5.96Fair | NoneNo third-party COA was publicly available at audit time | $2.30/mg | Shop → | |
| 7 | Raw Amino | 5.69Fair | View (opens in new tab) | $3.15/mg | Shop → |
Listed separately: 2 vendors outside the ranking
These carry Cortagen 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 2 vendors that fail the testing gate
| # | Vendor | PSR score | Cortagen certificate |
|---|---|---|---|
| 1 | Swiss Chems | 5.33Weak | NoneNo third-party COA was publicly available at audit time |
| 2 | Welon Peptide Solutions | 2.13Poor | NoneNo third-party COA was publicly available at audit time |
Best Cortagen vendors: frequently asked questions
Who is the best Cortagen vendor?
By PSR score, Pure Health Peptides is the highest-rated open store carrying Cortagen that passes our testing gate (7.88/10, Strong). Amino USA (7.61) and BioLongevity Labs (7.35) follow. The certificate each of them posts for Cortagen is shown beside the score, so a reader can check it before buying.
Where can I buy Cortagen with a discount code?
2 affiliate partners carrying Cortagen pass our testing gate and give readers a code that applies to it. The highest rated is BioLongevity Labs (code PSR, 15% off). We may earn a commission on those links; it never changes a score or a rank.
How are these Cortagen 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 Cortagen are shown but do not change the order, and affiliate status never does.
Why are some Cortagen vendors listed separately?
2 vendors carrying Cortagen 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 Cortagen certificate of analysis?
Open the certificate from the vendor's row, confirm it names Cortagen and a batch, then look up the verification key on the testing laboratory's own site. 4 of the 9 Cortagen 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.