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SKU: MPSX
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Research-grade Semax peptide, 10mg lyophilized vial. Third-party tested, COA included. For research use only.
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Third-Party Tested
Independent lab verification
COA Available
Certificate of Analysis included
Free Shipping
On all domestic orders
Research Use Only
For laboratory research purposes
For In Vitro Research Use Only — Not for Human or Veterinary Use
Intended Use: This compound is intended exclusively for in vitro research applications. It is not to be used for human or animal administration, nor in any drug, food, cosmetic, or diagnostic product.
⚠️ Legal Disclaimer: The information provided has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease or condition. It is intended solely for use by qualified professionals in licensed laboratory environments.
Terms of Sale: By purchasing from Midwest Peptide, the buyer certifies that they are a qualified researcher and assumes full responsibility for proper handling, usage, and regulatory compliance. All sales are final.
Semax is a synthetic heptapeptide developed in Russian neuropeptide research, derived from the ACTH(4-10) fragment of adrenocorticotropic hormone with N-terminal modifications. In research it is studied for neurotrophic, nootropic, and BDNF pathway mechanisms in rodent models. Supplied strictly for Research Use Only.
Both are synthetic Russian-developed neuropeptides but with different sequences and target profiles. Semax is derived from ACTH(4-10) and is primarily studied for nootropic and neuroprotective mechanisms. Selank is derived from tuftsin and is primarily studied for anxiolytic-like and immunomodulatory mechanisms in research models.
Semax is studied in preclinical research on BDNF expression, NGF signaling, dopaminergic and cholinergic neurotransmission, learning and memory model systems, and neuroprotection in rodent stroke models. All cited studies are conducted in cellular or rodent systems.
Research articles and insights related to Semax

Semax neuroinflammation research covering microglial polarization, astrocyte modulation, cytokine profiles, and blood brain barrier protection. For research use only.
April 24, 2026

Semax retinal research covering retinal ganglion cell protection, optic nerve injury models, glaucoma research, and ischemic retinopathy in preclinical research. For research use only.
April 24, 2026

Semax sourcing guide covering supplier evaluation for an ACTH derived heptapeptide with intranasal research applications and the Midwest Peptide catalog. For research use only.
April 14, 2026

Semax attention research covering rodent attention paradigms, ADHD related models, dopaminergic noradrenergic effects, and cognitive integration. For research use only.
April 14, 2026
Research Use Only. These products are not supplements, drugs, or intended for human or veterinary use. These products are for laboratory research purposes only. All product information available on this website is for educational purposes only. The products offered on this website are not intended to diagnose, treat, cure, or prevent any disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This material is sold for in-vitro research purposes only.
Research Use Only. This product is intended solely for laboratory research purposes. Not for human or veterinary use. Not for food or cosmetic use. By purchasing, the buyer agrees to use this product only for research applications.
Every batch of semax ships with a third-party COA verifying purity by HPLC (>=99%), identity by mass spectrometry, and lyophilized mass. The batch-specific COA is published on this product page before purchase.
Lyophilized semax is stored at -20C for long-term storage and 2-8C for short-term use within 30 days. Avoid repeated freeze-thaw cycles. Store in original sealed vials, protected from light.
Semax is not FDA-approved. It is registered as a therapeutic in some non-US jurisdictions. The product supplied here is for laboratory and research use only and is not approved for diagnostic, therapeutic, or human use.