Modern Research Peptides vs Peptides Greyhouse
Across the 40 products both vendors stock, Modern Research Peptides has the lower effective price per mg on 31 and Peptides Greyhouse on 9. Modern Research Peptides lists 83 tracked listings across 44 products; Peptides Greyhouse lists 93 across 63. On certificates of analysis the in-stock products we track rate broad at Modern Research Peptides and none found at Peptides Greyhouse. 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
- 31 of 40 shared
- COA coverage
- Broad
Peptides Greyhouse is a research-peptide vendor that lists 93 injectable peptides, including Selank, Semax and Epitalon.
- Price vs market median
- 7% above market
- Tracked catalog
- 63 products · $$$
- Cheaper on
- 9 of 40 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
4 products the other vendor does not list
Only at Peptides Greyhouse
23 products the other vendor does not list
- FOXO4-DRI$27.60
- Adamax$7.50
- Adipotide$7.60
- AICAR$0.96
- AOD-9604$8.50
- Cerebrolysin$0.75
- Chonluten$2.55
- CJC-1295 (with DAC)$8
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Modern Research Peptides cheaper than Peptides Greyhouse?
- On the 40 products both vendors stock, Modern Research Peptides has the lower effective price per mg on 31 and Peptides Greyhouse on 9. 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. Peptides Greyhouse: 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 Peptides Greyhouse?
- Modern Research Peptides: shipping $9.99. Peptides Greyhouse: 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.