Fusion Peptide vs Peptide Supply Co
Across the 22 products both vendors stock, Fusion Peptide has the lower effective price per mg on 15 and Peptide Supply Co on 5, and 2 price the same to the cent. Fusion Peptide lists 149 tracked listings across 26 products; Peptide Supply Co lists 69 across 54. On certificates of analysis the in-stock products we track rate partial at Fusion Peptide and broad at Peptide Supply Co. 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 47 injectable peptides and 1 nasal spray.
- Price vs market median
- 22% below market
- Tracked catalog
- 26 products · $
- Cheaper on
- 15 of 22 shared
- COA coverage
- Partial
Peptide Supply Co is a US research-peptide vendor that lists 67 injectable peptides, 11 blends and 1 capsule.
- Price vs market median
- 20% below market
- Tracked catalog
- 54 products · $
- Cheaper on
- 5 of 22 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 Supply Co 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
4 products the other vendor does not list
Only at Peptide Supply Co
32 products the other vendor does not list
- DSIP$4
- Epitalon$1.40
- Ipamorelin$3.50
- KPV$4
- Pinealon$3.50
- Retatrutide$3.33
- Thymosin Alpha-1$7
- Tirzepatide$1.75
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Fusion Peptide cheaper than Peptide Supply Co?
- On the 22 products both vendors stock, Fusion Peptide has the lower effective price per mg on 15 and Peptide Supply Co on 5, with 2 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?
- Fusion Peptide: partial, newest test dated 2026-02-25. Peptide Supply Co: broad, newest test dated 2026-09-11. 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 Supply Co?
- Fusion Peptide: accepts card, zelle, cashapp, crypto. Peptide Supply Co: shipping free, 2-2 days in transit. Details come from each vendor's own site and can change without notice; check the storefront before ordering.