semax

Semax is a synthetic peptide, an analog of ACTH, developed in Russia for its powerful neuroprotective and nootropic (cognitive-enhancing) effects, used intranasally to improve memory, learning, stress resistance, and neuroplasticity, potentially benefiting stroke, brain injury, and cognitive decline by boosting BDNF and protecting neurons, though its mechanism isn't fully understood and English-language human studies are limited.