Fusion Peptide vs Peptide Works
Across the 33 products both vendors stock, Fusion Peptide has the lower effective price per mg on 31 and Peptide Works on 2. Fusion Peptide lists 159 tracked listings across 45 products; Peptide Works lists 92 across 50. On certificates of analysis the in-stock products we track rate partial at Fusion Peptide 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.
Fusion Peptide is a US research-peptide vendor based in Glendale, AZ that lists 87 injectable peptides and 2 nasal sprays.
- Price vs market median
- 44% below market
- Tracked catalog
- 45 products · $
- Cheaper on
- 31 of 33 shared
- COA coverage
- Partial
Peptide Works is a research-peptide vendor that lists 82 injectable peptides, including PT-141, Melanotan II and GHK-Cu.
- Price vs market median
- 17% below market
- Tracked catalog
- 50 products · $
- Cheaper on
- 2 of 33 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 Fusion Peptide and 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 Fusion Peptide
12 products the other vendor does not list
- Tirzepatide$1.41
- ARA-290$2.11
- Cagrilintide$5.50
- Cortagen$2.06
- Crystagen$1.65
- IGF-1 DES$29.42
- Livagen$2.14
- Ovagen$2.14
Only at Peptide Works
17 products the other vendor does not list
- FOXO4-DRI$23.91
- ACE-031$116.79
- 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 Fusion Peptide cheaper than Peptide Works?
- On the 33 products both vendors stock, Fusion Peptide has the lower effective price per mg on 31 and Peptide Works on 2. 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. 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 Fusion Peptide and Peptide Works?
- Fusion Peptide: accepts card, zelle, cashapp, crypto. 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.