Fusion Peptide vs OPS Peptide Science
Across the 37 products both vendors stock, Fusion Peptide has the lower effective price per mg on 37 and OPS Peptide Science on 0. Fusion Peptide lists 157 tracked listings across 50 products; OPS Peptide Science lists 89 across 46. On certificates of analysis the in-stock products we track rate partial at Fusion Peptide and none found at OPS Peptide Science. 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.
Fusion Peptide is a US research-peptide vendor based in Glendale, AZ that lists 95 injectable peptides and 2 nasal sprays.
- Price vs market median
- 40% below market
- Tracked catalog
- 50 products · $
- Cheaper on
- 37 of 37 shared
- COA coverage
- Partial
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
- 0 of 37 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 Fusion Peptide 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 Fusion Peptide
13 products the other vendor does not list
- SS-31$1.35
- ARA-290$2.11
- Cortagen$2.06
- Crystagen$1.65
- IGF-1 DES$29.42
- Livagen$2.14
- Ovagen$2.14
- Pancragen$1.50
Only at OPS Peptide Science
9 products the other vendor does not list
- Retatrutide$6.33
- ACE-031$200
- Cerebrolysin$0.92
- Dermorphin$14
- GDF-8 (Myostatin)$190
- Hexarelin$21
- LL-37$21
- Semaglutide$4.67
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Fusion Peptide cheaper than OPS Peptide Science?
- On the 37 products both vendors stock, Fusion Peptide has the lower effective price per mg on 37 and OPS Peptide Science on 0. 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?
- Fusion Peptide: partial, newest test dated 2026-02-25. OPS Peptide Science: 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 Fusion Peptide and OPS Peptide Science?
- Fusion Peptide: accepts card, zelle, cashapp, crypto. OPS Peptide Science: 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.