Brain Fog & Focus

Semax is an ACTH(4-7) analogue that directly upregulates BDNF (brain-derived neurotrophic factor) and NGF (nerve growth factor) — the proteins responsible for neuronal growth, survival, and plasticity. Russian clinical trials show improvements in attention, memory consolidation, and cognitive recovery after stroke. It also exerts neuroprotective effects by reducing oxidative stress in neural tissue.

Semax is primarily a cognitive enhancer and neuroprotective agent — it boosts BDNF, sharpens focus, and improves memory. Selank has a stronger anxiolytic profile — it modulates GABA-A receptors and reduces anxiety without sedation, making it closer to an adaptogen. Many researchers use them together: Semax for cognitive performance and Selank for the anxiety/stress component that often underlies brain fog.

Semax and Selank have been approved as prescription nasal sprays in Russia for over 20 years, with an extensive safety record. They are both very short peptides that are rapidly degraded by peptidases and do not accumulate. Reported side effects are mild and rare — occasional nasal irritation with intranasal administration. Standard research protocols cycle them 4 weeks on, 2 weeks off to prevent receptor desensitisation.