Peptide Works vs Tetrava Labs
Across the 41 products both vendors stock, Peptide Works has the lower effective price per mg on 31 and Tetrava Labs on 10. Peptide Works lists 90 tracked listings across 53 products; Tetrava Labs lists 99 across 51. On certificates of analysis the in-stock products we track rate broad at Peptide Works and none found at Tetrava Labs. Based on the certificates our crawler found; vendors may publish more than we index. These are price and document observations, not quality ratings, and neither vendor is endorsed.
Peptide Works is a research-peptide vendor that lists 88 injectable peptides, including PT-141, Melanotan II and Selank.
- Price vs market median
- 16% below market
- Tracked catalog
- 53 products · $
- Cheaper on
- 31 of 41 shared
- COA coverage
- Broad
Tetrava Labs is a research-peptide vendor that lists 99 injectable peptides, 1 capsule and 2 nasal sprays.
- Price vs market median
- 13% above market
- Tracked catalog
- 51 products · $$$
- Cheaper on
- 10 of 41 shared
- COA coverage
- None found
Vendor facts
Dashes mark facts we have not recorded yet. Vendor-stated details come from each storefront and can change without notice. Facts for Peptide Works were extracted from the vendor's site and not yet reviewed by us.
Certificates on file
Coverage rates how many of the in-stock products we track have a certificate our pipeline read and matched to a catalog peptide. Based on the certificates our crawler found; vendors may publish more than we index. We do not test products, and a certificate cannot show authenticity, chain of custody or sterility.
Carried by one vendor only
Only at Peptide Works
12 products the other vendor does not list
- PT-141$2.60
- ACE-031$116.79
- B7-33$9.72
- Bronchogen$2.51
- Cartalax$2.51
- Follistatin$107.43
- GDF-8 (Myostatin)$106.82
- Orexin A and Orexin B$23.83
Only at Tetrava Labs
10 products the other vendor does not list
- Retatrutide$9.09
- Tirzepatide$8.58
- ARA-290$5.90
- Cagrilintide$14.90
- Cerebrolysin$6.90
- Dermorphin$15.80
- Dihexa$9.90
- Mazdutide$11.90
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Peptide Works cheaper than Tetrava Labs?
- On the 41 products both vendors stock, Peptide Works has the lower effective price per mg on 31 and Tetrava Labs on 10. Each side uses the cheapest in-stock listing we track for that product, after any public discount code, and prices change often.
- How much COA coverage does each vendor have?
- Peptide Works: broad, newest test dated 2025-09-21. Tetrava Labs: none found. Based on the certificates our crawler found; vendors may publish more than we index. We do not test products ourselves, and a certificate cannot prove authenticity or sterility.
- How do shipping and payment differ between Peptide Works and Tetrava Labs?
- Peptide Works: accepts card, zelle, wire, crypto. Tetrava Labs: we have not recorded shipping or payment details yet. Details come from each vendor's own site and can change without notice; check the storefront before ordering.