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Compound library

Peptides

Deep profiles for diligence, not product pages. Filter by goal or open any profile for mechanism, evidence, and citations.

45 compounds catalogued

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AllRecoveryFat lossMuscle / GH axisSkin / repairSleep / recovery adjunctMetabolicCognitive / nootropicMood / anxietyNeuroprotectionImmune supportGut healthLongevity / agingSexual health

Showing 5 peptides tagged Cognitive / nootropic.

Semax

Limited human data

A synthetic heptapeptide analogue of ACTH(4-10), registered as a prescription drug in Russia for ischemic stroke and optic nerve conditions. One of the most frequently discussed "nootropic peptides" in biohacking communities, alongside Selank.

Cognitive / nootropic · Neuroprotection

Selank

Limited human data

A synthetic heptapeptide anxiolytic developed alongside Semax at Russia's Institute of Molecular Genetics, studied for generalized anxiety disorder and neurasthenia. Frequently paired with Semax in nootropic-peptide discussions.

Cognitive / nootropic · Mood / anxiety

Noopept

Limited human data

A synthetic dipeptide developed as a piracetam analogue, sold as a prescription nootropic in Russia for cognitive impairment following stroke and traumatic brain injury. A recurring name in international nootropic-stacking discussions despite thin Western trial data.

Cognitive / nootropic

Cerebrolysin

Limited human data

A mixture of low-molecular-weight peptides and amino acids derived from purified porcine brain proteins, approved in several countries for stroke and traumatic brain injury recovery. Distinct from single-sequence research peptides: it's a multi-component biological preparation.

Cognitive / nootropic · Neuroprotection

Dihexa

Emerging

A small, orally active molecule derived from angiotensin IV, developed as a potential cognition-enhancing compound by potentiating HGF/c-Met signaling involved in synapse formation. Studied only in animal models; its foundational 2013 paper has since received a formal journal Notice of Concern, adding an important caveat to an already early-stage evidence base.

Cognitive / nootropic · Neuroprotection

Evidence labels

  • EmergingMostly preclinical or early signals; human athletic data is thin.
  • Limited human dataSome human pharmacology or small studies; outcomes for fitness use remain limited.
  • Stronger clinical signalSupported by larger clinical trials in defined medical populations.

Anodized by evidence strength: blue = stronger clinical/human data, violet = limited human data or mechanism, steel = emerging/anecdotal, and amber = an in-house STACKD summary.