Understand the source comparison
Best Peptides for Neuroprotection: Mechanism Comparison
Cerebrolysin BDNF/NGF receptor agonism via multi-peptide mixture Requires IV/IM. Does not passively cross BBB 2.5–5 mL IM (scaled by weight) 4–6 hours Intramuscular or intravenous Best for protocols requiring broad neurotrophic support. Established clinical da
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Cerebrolysin
- BDNF/NGF receptor agonism via multi-peptide mixture
- Requires IV/IM. Does not passively cross BBB
- 2.5–5 mL IM (scaled by weight)
- 4–6 hours
- Intramuscular or intravenous
- Best for protocols requiring broad neurotrophic support. Established clinical data
- P21 (CNTF derivative)
- CREB pathway modulation and transcriptional upregulation
- Lipophilic modification enables passive diffusion
- 1–5 mg/kg SC or intranasal
- 3–4 hours
- Subcutaneous or intranasal
- Best for transcription-focused studies. Intranasal route maximizes CNS delivery
- Dihexa
- HGF/c-Met receptor potentiation and synaptogenesis amplification
- Small molecular weight (<1 kDa) allows oral absorption and BBB crossing
- 1–4 mg/kg SC or 3–10 mg/kg oral
- 30–60 minutes
- Subcutaneous or oral
- Best for synaptic density studies. Oral bioavailability unique among CNS peptides
- This comparison highlights that no single peptide covers all neuroprotective mechanisms. Cerebrolysin excels in broad neurotrophic support with established dosing precedent, P21 targets gene expression changes most effectively through intranasal delivery, and Dihexa's synaptogenic potency paired with oral availability makes it the only peptide in this class suitable for chronic oral administration studies.