Reviewed by PeptideGuide Research Team|Last updated February 15, 2026
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Side-by-Side Comparison
Property
Semax
Selank
Name
Semax
Selank
Peptide Class
Neuropeptide
Synthetic peptide
Category
Cognitive and Nootropic
Cognitive and Nootropic
Dosage Range
300 mcg to 600 mcg per day
250 mcg to 3 mg per day
Half-Life
Several hours
N/A
FDA Status
Not Approved
Not Approved
Safety Rating
Generally Well-Tolerated
Generally Well-Tolerated
Cost Estimate
$50-100 per month
$50-150/month
Semax
Semax, a synthetic peptide derived from the adrenocorticotropic hormone, is primarily used for its cognitive-enhancing and neuroprotective properties....
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Selank is a synthetic peptide known for its cognitive and anxiolytic properties. It is primarily used to reduce anxiety and enhance cognitive function...
View full profile →