American Peptide Research vs Peptides Greyhouse
Across the 34 products both vendors stock, American Peptide Research has the lower effective price per mg on 12 and Peptides Greyhouse on 22. American Peptide Research lists 54 tracked listings across 38 products; Peptides Greyhouse lists 94 across 62. On certificates of analysis the in-stock products we track rate partial at American Peptide Research 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.
American Peptide Research is a US research-peptide vendor based in Englewood, New Jersey that lists 44 injectable peptides.
- Price vs market median
- 51% above market
- Tracked catalog
- 38 products · $$$
- Cheaper on
- 12 of 34 shared
- COA coverage
- Partial
Peptides Greyhouse is a research-peptide vendor that lists 92 injectable peptides, including Selank, Semax and Epitalon.
- Price vs market median
- 8% above market
- Tracked catalog
- 62 products · $$$
- Cheaper on
- 22 of 34 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 American Peptide Research 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 American Peptide Research
4 products the other vendor does not list
- Follistatin$139
- Hexarelin$15.80
- Melanotan I$7.40
- SLU-PP-332$16
Only at Peptides Greyhouse
28 products the other vendor does not list
- NAD+$0.27
- Retatrutide$12.67
- Tirzepatide$11.83
- Adamax$7.50
- AICAR$0.96
- Cagrilintide$15
- Cardiogen$2.25
- Cartalax$2.25
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is American Peptide Research cheaper than Peptides Greyhouse?
- On the 34 products both vendors stock, American Peptide Research has the lower effective price per mg on 12 and Peptides Greyhouse on 22. 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?
- American Peptide Research: partial, newest test dated 2025-06-25. 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 American Peptide Research and Peptides Greyhouse?
- American Peptide Research: accepts card. 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.