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Peptides for Memory: Research-Grade Options Comparison
Cerebrolysin BDNF/NGF mimetic. TrkB receptor activation Passive diffusion (400–800 Da peptides) 2.5–5 mL/kg body weight Refrigerate at 2–8°C; 28-day post-reconstitution window Most extensively studied neuropeptide. 200+ trials in stroke and TBI models. Consist
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- Cerebrolysin
- BDNF/NGF mimetic. TrkB receptor activation
- Passive diffusion (400–800 Da peptides)
- 2.5–5 mL/kg body weight
- Refrigerate at 2–8°C; 28-day post-reconstitution window
- Most extensively studied neuropeptide. 200+ trials in stroke and TBI models. Consistency across batches is critical.
- Dihexa
- HGF receptor agonist. Promotes synaptogenesis
- Passive diffusion (<1000 Da)
- 0.1–1 mg/kg body weight
- Store lyophilised at −20°C; reconstituted at 2–8°C
- Potent synaptic remodeling agent. Requires precise dosing. Narrow therapeutic window. Not suitable for chronic daily use.
- P21
- CNTF-derived. NMDA receptor modulation, neuroprotection
- Small peptide crosses via passive diffusion
- 1–10 mg/kg body weight
- Stable lyophilised at −20°C for 24 months; use reconstituted within 21 days
- Best evidence in acute injury models (TBI, stroke). Less data on healthy cognition enhancement.
- Thymalin
- Thymic peptide. Secondary neuroprotection via immune modulation
- Limited CNS penetration; peripheral immune effects dominate
- 10–50 mg per administration
- Refrigerate; avoid freeze-thaw
- Indirect cognitive effects through systemic inflammation reduction. Not a primary memory peptide.
- This comparison reflects research-grade formulations. Peptides marketed as supplements often contain insufficient concentrations or incorrect isoforms to produce the mechanisms listed.