Peptide Supply Co vs peptidology
Across the 32 products both vendors stock, Peptide Supply Co has the lower effective price per mg on 23 and peptidology on 7, and 2 price the same to the cent. Peptide Supply Co lists 69 tracked listings across 54 products; peptidology lists 74 across 43. On certificates of analysis both show broad COA coverage of the in-stock products we track. 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 67 injectable peptides, 11 blends and 1 capsule.
- Price vs market median
- 20% below market
- Tracked catalog
- 54 products · $
- Cheaper on
- 23 of 32 shared
- COA coverage
- Broad
peptidology is a US research-peptide vendor based in Scottsdale, AZ that lists 60 injectable peptides and 1 capsule.
- Price vs market median
- 10% below market
- Tracked catalog
- 43 products · $
- Cheaper on
- 7 of 32 shared
- COA coverage
- Broad
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 and peptidology 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
22 products the other vendor does not list
- PT-141$3.50
- Retatrutide$3.33
- Semax$3.80
- SS-31$2.60
- Tesamorelin$5.75
- Tirzepatide$1.75
- Adamax$6
- Cagrilintide$8.50
Only at peptidology
11 products the other vendor does not list
- FOXO4-DRI$10.80
- ACE-031$159
- AICAR$1.61
- Cortagen$2.47
- Follistatin$161.99
- GHRP-2$3.90
- Gonadorelin$5.56
- LL-37$8.10
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Peptide Supply Co cheaper than peptidology?
- On the 32 products both vendors stock, Peptide Supply Co has the lower effective price per mg on 23 and peptidology on 7, with 2 priced the same to the cent. 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. peptidology: broad, newest test dated 2026-09-09. 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 peptidology?
- Peptide Supply Co: shipping free, 2-2 days in transit. peptidology: ships from Scottsdale, AZ. Details come from each vendor's own site and can change without notice; check the storefront before ordering.