Modern Research Peptides vs Peptide Supply Co
Across the 33 products both vendors stock, Modern Research Peptides has the lower effective price per mg on 28 and Peptide Supply Co on 5. Modern Research Peptides lists 70 tracked listings across 41 products; Peptide Supply Co lists 69 across 54. On certificates of analysis both show broad COA coverage of the in-stock products we track. 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.
Modern Research Peptides is a US research-peptide vendor that lists 66 injectable peptides, including NAD+, 5-Amino-1MQ and MOTS-c.
- Price vs market median
- 29% below market
- Tracked catalog
- 41 products · $
- Cheaper on
- 28 of 33 shared
- COA coverage
- Broad
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 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 Modern Research Peptides 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 Modern Research Peptides
8 products the other vendor does not list
- GHRP-2$3
- GHRP-6$4.60
- Gonadorelin$6.60
- Hexarelin$14
- L-Carnitine$0.07
- LL-37$7.60
- Matrixyl$8
- Thymalin$4.60
Only at Peptide Supply Co
21 products the other vendor does not list
- Tirzepatide$1.75
- Adamax$6
- AOD-9604$6.50
- CJC-1295 (with DAC)$10
- Dihexa$16
- GHK-Cu + KPV$0.93
- GLOW$1.11
- IGF-LR3$48
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Modern Research Peptides cheaper than Peptide Supply Co?
- On the 33 products both vendors stock, Modern Research Peptides has the lower effective price per mg on 28 and Peptide Supply Co on 5. 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?
- Modern Research Peptides: broad, newest test dated 2026-07-13. 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 Modern Research Peptides and Peptide Supply Co?
- Modern Research Peptides: shipping $9.99. 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.