How it works.

Semax is a synthetic analog of the ACTH(4-10) fragment, extended at the C-terminus with a Pro-Gly-Pro motif that confers resistance to peptidase cleavage while removing the corticotropic activity of the parent hormone. In published research it is associated with increased expression of brain-derived neurotrophic factor (BDNF) and its receptor TrkB, modulation of the dopaminergic and serotonergic systems, and neuroprotective effects in models of ischemic and cognitive stress.

ACTH(4-10) + Pro-Gly-Propeptidase-resistant
BDNF / TrkB ↑neurotrophic signaling
no corticotropic armcentral effects isolated

Verified buyer notes.

Initials only — every quote is verified against an order record. We don’t ghost-write reviews.

COA matched what we ran in-house. Powder reconstituted clean, no haze. Did exactly what we needed it to.
M.O.Boston, MAApril 2026
Switched after two bad lots from a previous source. Three orders in, zero issues.
J.K.Austin, TXMarch 2026
Asked support a purity question and got the raw HPLC trace back within the hour. That transparency is why we reorder.
S.L.Chicago, ILFebruary 2026