Semax
Synthetic ACTH analog developed in Russia, enhances BDNF production and cognitive performance
Semax is a synthetic peptide derived from the adrenocorticotropic hormone (ACTH) fragment 4-10. Developed at the Institute of Molecular Genetics of the Russian Academy of Sciences, it has been used in Russia since the 1990s for various neurological conditions, including stroke recovery and cognitive impairment.
The peptide's primary mechanism involves increasing brain-derived neurotrophic factor (BDNF) levels, which supports neuronal health, synaptic plasticity, and cognitive function. Semax also modulates the serotoninergic and dopaminergic systems, contributing to mood stabilization and focus enhancement.
Unlike stimulant-based cognitive enhancers, Semax provides cognitive benefits without the typical side effects of increased heart rate, anxiety, or dependency. Its neuroprotective properties have made it popular among biohackers seeking sustainable cognitive optimization.
Primary Benefits
Synthetic analog of tuftsin with anxiolytic and nootropic effects, no dependency or tolerance risk
HGF/MET signaling amplifier and among the most potent synaptogenic nootropics studied — note: foundational study retracted April 2025
Cerebrolysin-inspired neurogenic peptide designed to enhance BDNF signaling and promote hippocampal neurogenesis