Peptide Science Basics: Evidence-First Education on Peptides and Health

Key Takeaways Semax and Selank are synthetic peptides developed in Russia decades ago and have been used there in approved clinical formulations, but neither is FDA-approved for any indication in the United States. Semax's most-documented mechanism is upregulating brain-derived neurotrophic factor (BDNF), a protein tied to neuron growth, survival, and synaptic plasticity; Selank's most-studied mechanism is modulating the GABA system, the brain's primary calming pathway. The s