Semax and Selank are unusual entries in the grey-market peptide catalog: they aren't speculative research chemicals but actual approved drugs in Russia, on the country's List of Vital and Essential Drugs, prescribed for decades. Both come from the same institute, use the same molecular design trick, and carry a real mechanistic story around BDNF and neurotransmitter modulation. The catch is that almost the entire evidence base lives in Russian-language journals and small non-randomized trials that Western medicine has never independently replicated — and "approved in Russia" is a weaker credential than the marketing makes it sound.
Selank
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Semax and Selank: The Russian Neuropeptide School