Side-by-side comparison
Selank vs Semax — Price & Profile Comparison
Selank
Cognitive & Anxiolytic PeptideSafety 8/10Anxiolytic / nootropic research
Semax
Cognitive & Neuroprotective PeptideSafety 8/10Nootropic / cognitive research
The short answer
Selank vs Semax: which to choose
On price they're close — about $21 vs $19 for the cheapest COA-verified listing. Semax is the more widely stocked of the two (40 vendors vs 37). Both hold the same 8/10 safety rating in our methodology. They target different goals — Selank is a cognitive & anxiolytic peptide compound while Semax is a cognitive & neuroprotective peptide one — so they're often complementary rather than direct substitutes.
Price Comparison — 2026
Selank
Semax
Vendors Carrying Both
37 vendors stock both Selank and Semax — convenient if you want to bundle an order.
Safety Notes
Selank
FDA: Approved in Russia
Approved in Russia; no sedation, amnesia, or dependence; appears very well-tolerated; limited Western data
Semax
FDA: Approved in Russia/Ukraine
Approved for neurological conditions in Russia; intranasal well-tolerated; no major safety signals