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Best Peptides for Cognitive Enhancement: Research Compound Comparison
Cerebrolysin BDNF, NGF, CNTF upregulation 5–10ml IM/IV, 5 days/week, 4–8 weeks Measurable at week 3–4 High (multiple RCTs, 1,200+ patients) Gold standard for post-stroke and TBI recovery; strongest human data Dihexa HGF receptor agonist (c-Met pathway) 5–10mg
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- Cerebrolysin
- BDNF, NGF, CNTF upregulation
- 5–10ml IM/IV, 5 days/week, 4–8 weeks
- Measurable at week 3–4
- High (multiple RCTs, 1,200+ patients)
- Gold standard for post-stroke and TBI recovery; strongest human data
- Dihexa
- HGF receptor agonist (c-Met pathway)
- 5–10mg SC every 48–72h, 4–8 weeks
- Measurable at week 4–6
- Moderate (strong preclinical, limited human trials)
- Most potent synaptogenic effect in animal models; human data pending
- P21
- STAT3 pathway activation, CNTF fragment
- Measurable at week 3–5
- Moderate (rodent models, anecdotal human use)
- Demonstrated long-term memory consolidation in mice; human protocols extrapolated
- Semax
- AMPA receptor modulation, BDNF upregulation
- 300–600mcg intranasal daily, 14–28 days
- Noticeable at day 10–14
- Moderate (Russian trials, limited Western replication)
- Reliable anxiolytic and focus enhancement; limited English-language data
- Selank
- GABA modulation, neuroinflammation suppression
- 200–400mcg intranasal daily, 14–28 days
- Noticeable at day 7–10
- Primarily anxiolytic; cognitive benefit indirect through stress reduction