The Cognitive Stack from NXTSTATE pairs two of the most extensively researched neuropeptides, Semax 10mg and Selank 10mg, into a single research bundle. Both compounds are lyophilized, individually tested at ≥99% HPLC purity, and shipped with a third-party Certificate of Analysis for the specific lot you receive. The Cognitive Stack is sold at a 15% discount versus purchasing the vials individually.

What the Cognitive Stack Includes

• 1 × Semax 10mg lyophilized vial
• 1 × Selank 10mg lyophilized vial
• Lot-specific Certificate of Analysis for each compound, available from the NXTSTATE Lab Reports library

Semax Research Background

Semax is a synthetic heptapeptide derived from a fragment of adrenocorticotropic hormone (ACTH 4-10). It was originally developed in Russia and remains the subject of an active body of preclinical and clinical research literature. Investigators have studied Semax for its effects on BDNF (brain-derived neurotrophic factor) and NGF (nerve growth factor) expression, dopaminergic and serotonergic signaling, attention and working memory in rodent models, and post-ischemic neuroprotection. A summary of published literature is indexed on PubMed.

Selank Research Background

Selank is a synthetic heptapeptide derived from a fragment of the immunomodulatory peptide tuftsin. It is most often studied for its anxiolytic profile, modulation of GABAergic transmission, enkephalin enzyme inhibition, and effects on interleukin signaling and stress-response behavior in rodent models. Published Selank literature is indexed on PubMed.

Why the Cognitive Stack Is Bundled

Semax and Selank are frequently studied together because their mechanisms are complementary. Semax tends to be characterized for activation, neurotrophic-factor expression, and cognitive enhancement endpoints, while Selank tends to be characterized for anxiolytic, anti-stress, and immunomodulatory endpoints. Bundling them as the Cognitive Stack reduces per-compound cost and ensures researchers receive matched-lot inventory in a single shipment.

Quality Standards

• ≥99% HPLC purity on both compounds (independently verified)
• Third-party lab tested with Certificate of Analysis on every lot
• Lyophilized for storage stability and predictable reconstitution
• Sealed and shipped from NXTSTATE
• Lot tracking enabled for audit and reproducibility

Handling and Storage

Both vials ship lyophilized and may be stored at room temperature for a short period after arrival. Long-term storage prior to reconstitution is recommended at refrigeration temperatures (2 to 8 degrees Celsius). Once reconstituted with bacteriostatic water, both peptides should be refrigerated and used within the timeframe outlined in standard peptide handling references. NXTSTATE sells Bacteriostatic Water separately for researchers who need diluent.

Important: Research Use Only

The Cognitive Stack is sold strictly for in vitro research, laboratory analysis, and preclinical investigation. It is not a medicine, supplement, or cosmetic. It is not intended for human or veterinary consumption, ingestion, or administration. By purchasing this product, you confirm you are a qualified researcher and that all materials will be handled in accordance with applicable laws and institutional protocols.