OPS Peptide Science vs Peptide Works
Across the 37 products both vendors stock, OPS Peptide Science has the lower effective price per mg on 2 and Peptide Works on 34, and 1 prices the same to the cent. OPS Peptide Science lists 89 tracked listings across 46 products; Peptide Works lists 90 across 53. On certificates of analysis the in-stock products we track rate none found at OPS Peptide Science and broad at Peptide Works. 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.
OPS Peptide Science is a research-peptide vendor that lists 89 injectable peptides, including GHK-Cu, Tirzepatide and Retatrutide.
- Price vs market median
- 57% above market
- Tracked catalog
- 46 products · $$$
- Cheaper on
- 2 of 37 shared
- COA coverage
- None found
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
- 34 of 37 shared
- COA coverage
- Broad
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 OPS Peptide Science
9 products the other vendor does not list
- Retatrutide$6.33
- Tirzepatide$4
- Cagrilintide$20.50
- Cerebrolysin$0.92
- Dermorphin$14
- Dihexa$12.90
- Mazdutide$23.50
- PNC-27$20
Only at Peptide Works
16 products the other vendor does not list
- FOXO4-DRI$23.91
- SS-31$6.96
- Adamax$10.93
- AICAR$0.66
- B7-33$9.72
- Bronchogen$2.51
- Cartalax$2.51
- Follistatin$107.43
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is OPS Peptide Science cheaper than Peptide Works?
- On the 37 products both vendors stock, OPS Peptide Science has the lower effective price per mg on 2 and Peptide Works on 34, with 1 priced the same to the cent. 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?
- OPS Peptide Science: none found. Peptide Works: broad, newest test dated 2025-09-21. 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 OPS Peptide Science and Peptide Works?
- OPS Peptide Science: we have not recorded shipping or payment details yet. Peptide Works: accepts card, zelle, wire, crypto. Details come from each vendor's own site and can change without notice; check the storefront before ordering.