Which peptide vendors can prove what's in the vial?
We track 15 research-peptide vendors: whether they publish certificates of analysis, whether those COAs match the lot you receive, what independent labs found, what they charge per mg, and whether regulators have acted against them. Every fact is sourced and dated.
- active vendors tracked
- 15
- publish lot-matched COAs
- 8 of 15
- prices normalized per mg
- 223
- enforcement events logged
- 13
Data checked Oct 21, 2026 · Ranked by a published method, never by commission · How we make money
Best peptide vendors
All 11 ranked →Score out of 100: COA transparency, independent tests, regulatory record, policy clarity.
Price per mg
Full index →Lowest and median listed vial price per mg across vendors.
| Compound | Lowest | Median | Vendors |
|---|---|---|---|
| BPC-157 | $4.90Ascension Peptides | $6.00 | 11 |
| TB-500 | $4.24Swiss Chems | $7.50 | 11 |
| GHK-Cu | $0.54DRYPtides | $0.80 | 11 |
| NAD+ | $0.09099 Purity Peptides | $0.12 | 11 |
| MOTS-c | $2.2599 Purity Peptides | $5.70 | 11 |
| Semax | $2.12Biotech Peptides | $3.00 | 9 |
Enforcement
Full tracker →HHS / FDA · Policy proposal
Compounding pharmacies (not RUO web sellers)
FDA · Warning letter
Peptide Partners LLC
FDA · Warning letter
Royal Peptides LLC
FDA · Warning letters
Peak Performance Peptides, NuScience Peptides, Tex Peptides (TXP)
INVIMA (Colombia) · Health alert
"Biotech Peptides" brand products
Reading a COA
HPLC shows how pure a sample is, not what it is. A COA earns trust when it names an independent lab, adds mass-spec identity, reports measured mg, and matches your lot.
Nine red flags to check →Newly tracked
DRYPtides review →As of October 2026, DRYPtides (dryptides.com, DRYPtides LLC, Irvine, CA) publishes one certificate of analysis per product, 36 of 38 from Bioviridian Inc. showing RP-HPLC purity of 99.7-99.9% and MALDI-MS identity.