Semax is a synthetic peptide derived from a fragment of ACTH (adrenocorticotropic hormone). It is studied in cognitive and neurological research and supplied for research use only.
What Semax is
Semax is based on a short fragment of ACTH, modified for stability. It is classed among neuropeptides because it is studied for its activity in the nervous system.

How it is studied
In the laboratory, Semax is studied in cognitive and neurological research, often alongside Selank. As a research peptide, it is a study tool and is not approved or intended for human use.
Browse research-grade peptides
Every Axis compound is third-party tested to 99.4%+ purity, with a certificate of analysis on every batch.
What to look for
A research-grade Semax should ship with a batch-specific certificate of analysis. For a comparison, see Semax vs. Selank.
Key takeaways
- Semax is a synthetic peptide derived from an ACTH fragment.
- It is classed among neuropeptides.
- It is studied in cognitive and neurological research, often with Selank.
- Research-grade Semax is supplied for research use only.
A note on research use
The peptides supplied by Axis Peptide Labs are reference compounds for laboratory and research use only. They are intended for qualified researchers working in academic, institutional, and analytical settings. They are not drugs, foods, cosmetics, or medical products, and they are not intended for human or veterinary consumption. Documented identity and documented purity are what matter most when sourcing a compound, both of which are published on the Axis certificates of analysis page.
