Best Semax Vendors in 2026
Cognitive / NeuroRanked by Finnrick trust score, purity testing, and price.
Peptidology is our #1 pick for Semax, with a Finnrick trust score of 7.6/10. Across 57 tracked vendors, prices range from $21.99 to $739.50. Rankings combine independent purity testing data, vendor trust scores, pricing, and stock availability. We never accept payment for placement.
- Cheapest per mg
- $0.84/mgat Peptidology
- Highest trust score
- Risynth Bio(9.1/10)
- In stock now
- 56 products across 57 vendors
- Last verified
- Aug 21, 2026
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How we rank vendors
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.
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Last updated: August 21, 2026