Prime Peptides is one of the better-disclosed vendors in our directory, with a named company, four named labs and 19 independent tests on Finnrick. When we checked on October 19, 2026, it listed Prime Vitality, Inc. in Santa Barbara, CA, and published lot-referenced COAs on a dedicated testing page. Its catalog is smaller than most, and prices are mixed outside the GLP-class items.
Notice: Prime Peptides' products are sold for in-vitro laboratory research only. They are not FDA-approved and not for human or animal use. This review covers supplier transparency and prices. We didn't buy or test any products. Some vendors pay us a commission when you buy through our links. That never changes a score or a price ranking.
Prime Peptides at a glance
- Website: primepeptides.co, live when checked.
- Based in: Santa Barbara, CA.
- Company: Prime Vitality, Inc.
- Testing labs/COAs: names Janoshik, Freedom Diagnostics, Bioviridian and Horizon Analytical; COAs at primepeptides.co/testing/.
- Independent tests (Finnrick): 19 tests listed on Finnrick.
- Payment: accepted methods not published on the pages we checked.
- Gate: none.
- Catalog: 20 peptide products listed.
- Checked: October 19, 2026.
Prices we checked
Prices on primepeptides.co on October 19, 2026, using the size with the lowest cost per mg:
| Peptide | Size | Price | Per mg | vs index median |
|---|---|---|---|---|
| Retatrutide | 60 mg | $325.00 | $5.42 | 30% below |
| Semaglutide | 20 mg | $150.00 | $7.50 | 19% below |
| BPC-157 | 10 mg | $55.00 | $5.50 | 8% below |
| TB-500 | 10 mg | $65.00 | $6.50 | 14% below |
| GHK-Cu | 100 mg | $60.00 | $0.60 | 14% below |
| NAD+ | 1000 mg | $135.00 | $0.135 | 4% above |
| MOTS-c | 10 mg | $60.00 | $6.00 | 33% above |
| Ipamorelin | 10 mg | $60.00 | $6.00 | 3% below |
| Tesamorelin | 10 mg | $80.00 | $8.00 | 2% above |
| Sermorelin | 10 mg | $70.00 | $7.00 | 18% below |
Retatrutide is the standout: even the 10 mg size ($110) is cheaper per mg than many vendors' larger sizes. MOTS-c is the main item priced above the median across the vendors in our price index. Compare retatrutide prices, semaglutide prices, BPC-157 prices and MOTS-c prices in our price index. We did not find tirzepatide in its catalog.
Testing and COAs
Prime Peptides has a dedicated testing page. The site mentions lot numbers alongside its COAs, and its homepage invites buyers to "check your lot" and says it has 49 lab certificates. It also mentions endotoxin or sterility testing.
The site names four labs: Janoshik, Freedom Diagnostics, Bioviridian and Horizon Analytical. We list them as named by the vendor; we have not verified any report with the labs. Finnrick lists 19 independent tests, which adds outside data. We don't report Finnrick ratings, so check results for your compound there.
What we like
- Named company (Prime Vitality, Inc.) and city (Santa Barbara, CA).
- Four testing labs named, with lot-referenced COAs.
- Endotoxin or sterility testing mentioned.
- 19 independent tests on Finnrick.
- Retatrutide and semaglutide priced well below the index median.
What to watch
- Small catalog: 20 peptide products, and no tirzepatide.
- MOTS-c is 33% above the index median.
- Payment methods aren't listed on the pages we checked.
- The site says it refreshed its logo, website and vial labels in October 2026, so older vials and photos may look different.
How it compares
Few vendors in our directory combine a named company, named labs and independent tests. See all vendors we track, peptide deals this week and our ranked list.
Bottom line
Prime Peptides publishes more about itself and its testing than most vendors we track, and its retatrutide pricing is strong. The catalog is narrow. Check Finnrick for your compound and confirm the lot on your COA.
