Double R Labs vs Peptides Greyhouse
Across the 31 products both vendors stock, Double R Labs has the lower effective price per mg on 25 and Peptides Greyhouse on 6. Double R Labs lists 37 tracked listings across 33 products; Peptides Greyhouse lists 94 across 62. On certificates of analysis the in-stock products we track rate partial at Double R Labs 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.
Double R Labs is a research-peptide vendor that lists 35 injectable peptides and 1 capsule, including 5-Amino-1MQ, DSIP and Tirzepatide.
- Price vs market median
- 29% below market
- Tracked catalog
- 33 products · $
- Cheaper on
- 25 of 31 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
- 6 of 31 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 Double R Labs 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 Double R Labs
2 products the other vendor does not list
Only at Peptides Greyhouse
31 products the other vendor does not list
- FOXO4-DRI$27.60
- NAD+$0.27
- Retatrutide$12.67
- Thymosin Alpha-1$10.50
- Adamax$7.50
- Adipotide$7.60
- AOD-9604$8.50
- Cardiogen$2.25
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Double R Labs cheaper than Peptides Greyhouse?
- On the 31 products both vendors stock, Double R Labs has the lower effective price per mg on 25 and Peptides Greyhouse on 6. 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?
- Double R Labs: partial, newest test dated 2026-08-20. 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 Double R Labs and Peptides Greyhouse?
- Double R Labs: accepts cashapp, paypal. 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.