Semax / SelankAlso known as: Semax, Selank, Semax/Selank blend

Mechanism of Action

Semax acts primarily by modulating neurotrophin systems, especially enhancing Brain-Derived Neurotrophic Factor (BDNF) signaling and impacting neurotransmission to support neuroprotection and cognition. Selank modulates the central nervous system by regulating neurotransmitter balance, particularly influencing the GABAergic system to exert anxiolytic effects without sedation. The combination aims to synergistically promote cognitive performance, mental clarity, stress resilience, and neurological homeostasis through complementary neurochemical pathways.

Reported Research Benefits

Used in research for improving focus, mental clarity, cognitive enhancement, memory and learning facilitation, stress and anxiety regulation, and overall neurological function support. Popular in nootropic and biohacking research for balancing stimulation and relaxation effects.

Dosing Protocol & Reconstitution

For research, peptides are provided as lyophilized powders to be reconstituted with bacteriostatic water. Typical research doses of Semax and Selank vary widely depending on study design but often fall into microgram to low milligram ranges per administration. Precise dosing ratios can be calculated using peptide calculators provided by vendors. Reconstituted peptides should be refrigerated (2–8°C) and used within recommended stability periods.

Research Notes

Semax has demonstrated neuroprotective and cognitive-enhancing properties with effects on BDNF and neurotransmitters; it has a relatively short half-life requiring repeated dosing in research contexts. Selank shows anxiolytic effects without sedation, influencing immune and nervous system parameters. The blend is under investigation for synergistic benefits on mental performance and stress resistance. Clinical data remain limited; primarily preclinical and small human trials exist.

Research Summary

A combination of Semax (ACTH analog with nootropic and neuroprotective effects) and Selank (tuftsin analog with anxiolytic and cognitive-enhancing properties). The stack is designed to provide cognitive enhancement via Semax's BDNF upregulation while Selank reduces associated anxiety and modulates the immune response — a complementary pairing popular in neurohacking communities.

Side Effects & Safety

Inherits the mild nasal irritation and potential stimulatory effects of Semax combined with Selank's favorable tolerability profile. No additive serious adverse events documented.

Stability & Storage

Refer to research notes

Molecular Data

Sequence: Semax: Met-Glu-His-Phe-Pro-Gly-Pro Selank: Thr-Lys-Pro-Arg-Pro-Gly-Pro

Primary literature: https://pubmed.ncbi.nlm.nih.gov/?term=Semax+Selank+nootropic+peptide+cognitive