Peptide Supply Co vs Peptides Greyhouse
Across the 41 products both vendors stock, Peptide Supply Co has the lower effective price per mg on 27 and Peptides Greyhouse on 14. Peptide Supply Co lists 71 tracked listings across 52 products; Peptides Greyhouse lists 94 across 62. On certificates of analysis the in-stock products we track rate broad at Peptide Supply Co 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.
Peptide Supply Co is a US research-peptide vendor that lists 60 injectable peptides, 11 blends and 1 capsule.
- Price vs market median
- 21% below market
- Tracked catalog
- 52 products · $
- Cheaper on
- 27 of 41 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
- 14 of 41 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 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 Peptide Supply Co
11 products the other vendor does not list
- Dihexa$16
- GHK-Cu + KPV$0.93
- GLOW$1.11
- Ipamorelin + CJC-1295 (no DAC)$5.50
- Melanotan I$3
- NAD+ + MOTS-c$0.41
- Semax + Selank$3
- TB-500 + BPC-157$2.75
Only at Peptides Greyhouse
21 products the other vendor does not list
- FOXO4-DRI$27.60
- Adipotide$7.60
- AICAR$0.96
- Cerebrolysin$0.75
- Chonluten$2.55
- Cortagen$2.25
- Crystagen$2.25
- GHRP-2$4.20
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Peptide Supply Co cheaper than Peptides Greyhouse?
- On the 41 products both vendors stock, Peptide Supply Co has the lower effective price per mg on 27 and Peptides Greyhouse on 14. 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?
- Peptide Supply Co: broad, newest test dated 2026-09-11. 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 Peptide Supply Co and Peptides Greyhouse?
- Peptide Supply Co: shipping free, 2-2 days in transit. 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.