Modern Research Peptides vs OPS Peptide Science
Across the 35 products both vendors stock, Modern Research Peptides has the lower effective price per mg on 35 and OPS Peptide Science on 0. Modern Research Peptides lists 83 tracked listings across 44 products; OPS Peptide Science lists 89 across 46. On certificates of analysis the in-stock products we track rate broad at Modern Research Peptides 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.
Modern Research Peptides is a US research-peptide vendor that lists 79 injectable peptides, including Retatrutide, BPC-157 and NAD+.
- Price vs market median
- 33% below market
- Tracked catalog
- 44 products · $
- Cheaper on
- 35 of 35 shared
- COA coverage
- Broad
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 35 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 Modern Research Peptides 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
9 products the other vendor does not list
- SS-31$2.09
- ARA-290$3.80
- Cardiogen$2.29
- Cartalax$2.30
- Gonadorelin$6.60
- L-Carnitine$0.07
- Matrixyl$6
- PE-22-28$4.50
Only at OPS Peptide Science
11 products the other vendor does not list
- ACE-031$200
- Adipotide$43
- AOD-9604$27
- Cerebrolysin$0.92
- CJC-1295 (with DAC)$41
- Dermorphin$14
- Dihexa$12.90
- GDF-8 (Myostatin)$190
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Modern Research Peptides cheaper than OPS Peptide Science?
- On the 35 products both vendors stock, Modern Research Peptides has the lower effective price per mg on 35 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?
- Modern Research Peptides: broad, newest test dated 2026-07-13. 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 Modern Research Peptides and OPS Peptide Science?
- Modern Research Peptides: shipping $9.99. 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.