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Research guides to neuropeptides studied in cognition and stress research, including Semax, Selank and DSIP, with notes on the quality of the evidence.
What NGF and BDNF are, why precursor forms do the opposite of mature ones, why adult human neurogenesis is still contested, and exactly what the published Semax, Selank and P021 work measured.
What Cerebrolysin is, why a mixture of brain-derived peptides cannot be characterised like a single research peptide, and what the Cochrane reviews of stroke and vascular dementia actually concluded.
Neuropeptides explained: how they differ from classic neurotransmitters, the major families from endorphins to orexin, and which ones researchers study.
Nootropic peptides explained: Semax, Selank, P021, PE-22-28 and DSIP compared by origin, mechanism and evidence, plus sourcing in Canada.
DSIP explained: the 1977 rabbit sleep peptide with no known gene or receptor, what studies found, why results conflict, and sourcing in Canada.
Semax vs Selank: two Russian-developed heptapeptides with the same Pro-Gly-Pro tail. What each is built from, what studies found, and Canadian sourcing.