Peptide
Semax
A peptide-based nootropic that supports neuroprotection, focus, and cognitive performance.
KÖGN Health grades Semax as B+ (Moderate evidence) and rates it 4.2 out of 5.
Last reviewed · June 2026
Primary effects
- Improved focus
- Memory support
- Neuroprotection
How it works
Modulates BDNF expression and neurotransmitter systems involved in cognition.
Overview
Semax is a synthetic peptide originally developed in Russia, studied for its neuroprotective and cognitive-enhancing properties. It is believed to influence BDNF (brain-derived neurotrophic factor), which plays a role in neuroplasticity and learning. While promising, much of the research is regionally concentrated, and broader clinical validation is still developing.
Related ingredients
Graded entries that target the same cognitive goals.
Categories
Educational information, not medical advice. The evidence grade is KÖGN’s editorial assessment of published research, not a health claim. Speak to a qualified clinician before changing what you take.