Best Nootropic Peptides for Cognitive Enhancement

Research peptides and compounds for brain performance - semax, selank, dihexa, P21 and more nootropics with mechanisms.

Semax

A synthetic peptide from ACTH(4-10) with Pro-Gly-Pro stabilization. Approved in Russia for stroke and cognitive disorders. Enhances attention, memory, and neuroplasticity.

Dose: 200-600 mcg per dose | Route: Intranasal drops/spray

Read full Semax guide →

Selank

A synthetic analog of tuftsin with Pro-Gly-Pro for stability. Developed at the Russian Academy of Sciences with anxiolytic and nootropic properties without sedation or addiction.

Dose: 250-750 mcg per spray dose | Route: Intranasal spray

Read full Selank guide →

Dihexa

An angiotensin IV analog reported 10 million times more potent than BDNF at enhancing synaptic connectivity. Promotes synaptogenesis and spinogenesis.

Dose: 10-20 mg (oral) or 2-5 mg (SubQ) | Route: Oral or Subcutaneous

Read full Dihexa guide →

P21

A CNTF-derived peptide promoting neurogenesis that crosses BBB. Stimulates hippocampal neurogenesis without CNTF appetite-suppressing effects.

Dose: 50-100 mcg/kg | Route: Intranasal or Subcutaneous

Read full P21 guide →

NSI-189

A small molecule stimulating hippocampal neurogenesis. Developed for MDD, it increases hippocampal volume measurable by MRI and improves cognition independent of mood effects.

Dose: 40-80 mg | Route: Oral

Read full NSI-189 guide →

Cerebrolysin

A multi-peptide preparation from porcine brain containing neurotrophic factors. Approved in 40+ countries for stroke and dementia, providing a cocktail of low-MW neuropeptides.

Dose: 5-30 mL | Route: Intramuscular or IV

Read full Cerebrolysin guide →

FGL

A peptide from the FG loop of neural cell adhesion molecule (NCAM). Enhances synaptic plasticity, memory, and neurotrophic effects through FGFR activation.

Dose: 1-5 mg/kg (research) | Route: Subcutaneous

Read full FGL guide →

IDRA-21

A positive allosteric modulator of AMPA receptors enhancing glutamatergic transmission. Effects last days after single dose.

Dose: 10-30 mg | Route: Oral

Read full IDRA-21 guide →

Noopept

A dipeptide-derived nootropic ~1000x more potent than piracetam. Enhances memory, focus, and provides neuroprotection through BDNF/NGF upregulation and AMPA/NMDA modulation.

Dose: 10-30 mg | Route: Oral or Sublingual

Read full Noopept guide →

NA-Selank

An acetylated form of Selank with improved stability and enhanced bioavailability. Same anxiolytic and cognitive benefits with longer duration.

Dose: 200-400 mcg | Route: Intranasal spray

Read full NA-Selank guide →

Cortagen

A synthetic tetrapeptide bioregulator derived from brain cortex that modulates cerebral cortex function. Part of the Khavinson peptide bioregulator family.

Dose: 10 mg | Route: Oral capsule or subcutaneous injection

Read full Cortagen guide →

Synapsin

A popular telemedicine compounded nasal spray combining ginsenoside Rg3, NAD+, and methylcobalamin for cognitive enhancement. Targets neuroinflammation, cellular energy, and nerve function directly vi

Dose: 1-2 sprays per nostril | Route: Intranasal spray

Read full Synapsin guide →

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