Good Science Bio vs Peptides Source
Across the 22 products both vendors stock, Good Science Bio has the lower effective price per mg on 5 and Peptides Source on 14, and 3 price the same to the cent. Good Science Bio lists 49 tracked listings across 23 products; Peptides Source lists 98 across 45. On certificates of analysis the in-stock products we track rate partial at Good Science Bio and none found at Peptides Source. 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.
Good Science Bio is a US research-peptide vendor based in Los Angeles, California that lists 36 injectable peptides.
- Price vs market median
- 1% above market
- Tracked catalog
- 23 products · $$
- Cheaper on
- 5 of 22 shared
- COA coverage
- Partial
Peptides Source is a research-peptide vendor that lists 97 injectable peptides, including NAD+, Epitalon and CJC-1295 (no DAC).
- Price vs market median
- 4% below market
- Tracked catalog
- 45 products · $$
- Cheaper on
- 14 of 22 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 Good Science Bio 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 Peptides Source
23 products the other vendor does not list
15 more on the Peptides Source pagePrices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Good Science Bio cheaper than Peptides Source?
- On the 22 products both vendors stock, Good Science Bio has the lower effective price per mg on 5 and Peptides Source on 14, with 3 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?
- Good Science Bio: partial, newest test dated 2026-05-27. Peptides Source: 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 Good Science Bio and Peptides Source?
- Good Science Bio: ships from United States, shipping $18, accepts card. Peptides Source: 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.