Ion Peptide vs Peptide Works
Across the 25 products both vendors stock, Ion Peptide has the lower effective price per mg on 15 and Peptide Works on 10. Ion Peptide lists 105 tracked listings across 36 products; Peptide Works lists 92 across 50. On certificates of analysis the in-stock products we track rate partial at Ion 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.
Ion Peptide is a US research-peptide vendor that lists 65 injectable peptides and 1 blend, including Tirzepatide, FOXO4-DRI and Retatrutide.
- Price vs market median
- 26% below market
- Tracked catalog
- 36 products · $
- Cheaper on
- 15 of 25 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
- 10 of 25 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 Ion 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 Ion Peptide
11 products the other vendor does not list
- Retatrutide$3.10
- Tirzepatide$1.69
- ARA-290$3.04
- Cagrilintide$8.42
- Cardiogen$2.01
- L-Carnitine$0.01
- Matrixyl$10.97
- PE-22-28$4.17
Only at Peptide Works
25 products the other vendor does not list
- BPC-157$4.16
- CJC-1295 (no DAC)$7.93
- Epitalon$1.14
- GHK-Cu$0.61
- MOTS-c$3.61
- Semax$5.08
- TB-500$6.32
- Thymosin Alpha-1$6.81
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Ion Peptide cheaper than Peptide Works?
- On the 25 products both vendors stock, Ion Peptide has the lower effective price per mg on 15 and Peptide Works 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?
- Ion Peptide: partial, newest test dated 2026-05-19. 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 Ion Peptide and Peptide Works?
- Ion Peptide: ships from US. 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.