Semax is a synthetic analogue of ACTH(4-7) developed in Russia. It is researched for its nootropic, neuroprotective, and neurotrophic properties, with studies examining effects on BDNF levels and cognitive function.

Research protocols typically use 200-600 mcg intranasally or subcutaneously, administered 1-2 times daily. Cycles commonly run 10-20 days. This calculator helps convert your vial concentration to accurate doses.

While both are nootropic peptides, Semax is an ACTH analogue focused on neurotrophic factors like BDNF, whereas Selank is a tuftsin analogue with additional anxiolytic properties. They are sometimes used together in research protocols.