Reviewed by PeptideGuide Research Team|Last updated February 15, 2026
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Side-by-Side Comparison
Property
Semax
Noopept
Name
Semax
Noopept
Peptide Class
Neuropeptide
Nootropic
Category
Cognitive and Nootropic
Cognitive and Nootropic
Dosage Range
300 mcg to 600 mcg per day
10-30 mg per day
Half-Life
Several hours
30-60 minutes
FDA Status
Not Approved
Not Approved
Safety Rating
Generally Well-Tolerated
Generally Well-Tolerated
Cost Estimate
$50-100 per month
$20-50/month
Semax
Semax, a synthetic peptide derived from the adrenocorticotropic hormone, is primarily used for its cognitive-enhancing and neuroprotective properties....
View full profile →Noopept
Noopept, known scientifically as N-phenylacetyl-L-prolylglycine ethyl ester, is a synthetic nootropic compound recognized for its potential cognitive-...
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