Ranked by Finnrick trust score, purity testing, and price.
Ruo Bio is our #1 pick for B7-33. Across 3 tracked vendors, prices range from $60.00 to $79.71, verified by Peptide Compare on 20 Sep 2026. Prices are scraped from vendor sites; trust scores come from Finnrick blind tests.
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| Rank | Vendor | Trust score | Per mg |
|---|---|---|---|
| #1 | Ruo BioOut of stock | untested | $6.00 |
| #2 | Behemoth LabzOut of stock | untested | $6.64 |
| #3 | Biotech Peptides | untested | $10.33 |
Our composite score weighs Finnrick blind-testing trust scores (62%), price competitiveness (25%), and stock availability (13%). Vendors without Finnrick data are sorted by price below scored vendors. We never accept payment for rankings. Learn more.