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Semax

ACTH(4-10) analog

Tier 3 · Limited Human Data
Class
ACTH fragment analog
Molecular target
BDNF/TrkB expression; melanocortin-independent
Sequence / structure
Met-Glu-His-Phe-Pro-Gly-Pro
Evidence tier
Tier 3 — Limited Human Data
Category
Neuropeptides

Biology & mechanism

A heptapeptide analog of ACTH(4-10) extended with a Pro-Gly-Pro tail that confers protease resistance. It lacks the corticotropic activity of the parent hormone. Reported effects centre on increased BDNF and NGF expression in the hippocampus and modulation of monoaminergic systems — the basis for nootropic and neuroprotective claims.

What the research actually shows

Developed and clinically studied in Russia, where it is a registered medicine for stroke and cognitive indications. The trial literature is largely Russian-language and has not been subjected to Western regulatory review; methodological quality is difficult to assess from outside. Independent replication is limited.

Regulatory status

Not FDA-approved. Registered as a medicine in Russia. Not lawfully marketed for human use in the US.

Safety signals

Russian clinical use suggests reasonable tolerability, but this rests on a literature that has not been independently audited. Long-term data unavailable.

No usage guidance is published here

Forge Bioenergy does not publish dosing, reconstitution, or administration protocols for any peptide. See our editorial policy for why. If you are considering any substance on this page, that conversation belongs with a licensed physician.

References & further reading

Regulatory status changes. This page reflects our reading of public sources as of July 2026 and should be independently verified before it is relied upon.

Important notice Forge Bioenergy publishes scientific reference information only. Nothing on this site is medical advice, a therapeutic claim, or a recommendation to use any substance in humans. Many peptides described here are not approved by the FDA for any use, and several are approved only for narrow indications under prescription. We do not publish dosing, administration, or usage protocols. Consult a licensed physician before making any medical decision.