Modern Aminos vs Peptides Greyhouse
Across the 35 products both vendors stock, Modern Aminos has the lower effective price per mg on 17 and Peptides Greyhouse on 18. Modern Aminos lists 74 tracked listings across 40 products; Peptides Greyhouse lists 94 across 62. On certificates of analysis the in-stock products we track rate broad at Modern Aminos 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 Aminos is a US research-peptide vendor based in Garden City, Idaho that lists 55 injectable peptides.
- Price vs market median
- 1% below market
- Tracked catalog
- 40 products · $$
- Cheaper on
- 17 of 35 shared
- COA coverage
- Broad
Peptides Greyhouse is a research-peptide vendor that lists 92 injectable peptides, including Selank, Semax and Epitalon.
- Price vs market median
- 8% above market
- Tracked catalog
- 62 products · $$$
- Cheaper on
- 18 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 Aminos 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 Aminos
5 products the other vendor does not list
- Bronchogen$2.70
- Dihexa$18.80
- Hexarelin$6.80
- P21$9.80
- Vasoactive Intestinal Peptide (VIP)$0.03
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Modern Aminos cheaper than Peptides Greyhouse?
- On the 35 products both vendors stock, Modern Aminos has the lower effective price per mg on 17 and Peptides Greyhouse on 18. 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 Aminos: broad, newest test dated 2026-08-27. 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 Aminos and Peptides Greyhouse?
- Modern Aminos: ships from Garden City, Idaho, 2-5 days in transit, accepts card, ach, crypto. 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.