Best Peptides for Cognitive Performance & Focus
Cognitive decline, brain fog, and difficulty focusing are concerns that span all age groups. Researchers have investigated several peptides for their potential neuroprotective, nootropic, and neurotrophic properties.
Semax and Selank were originally developed in Russia and have been studied for their effects on BDNF expression and anxiolytic activity. Dihexa is a newer compound researched for its potent neurotrophic effects in animal models, though human data remains extremely limited.
Recommended Peptides
Semax
Semax is a synthetic heptapeptide derived from ACTH (adrenocorticotropic hormone) developed in Russia. It is registered as a drug in Russia and Ukraine for cognitive enhancement, neuroprotection, and stroke treatment. It is studied for BDNF upregulation, memory enhancement, and anxiolytic effects.
Read full profile →Selank
Selank is a synthetic heptapeptide analog of the immunomodulatory peptide tuftsin, developed in Russia. It is registered as a drug in Russia for anxiety disorders and is studied for its anxiolytic, nootropic, and immunomodulatory properties with a favorable side effect profile.
Read full profile →Dihexa
Dihexa is a small molecule peptide analog derived from Angiotensin IV, developed at Washington State University and studied as a cognitive enhancer in animal models. Foundational research on dihexa has been called into question following a 2025 retraction. Until independent replication is published, claims about cognitive enhancement, BDNF analog activity, and HGF/c-Met agonism should be considered unverified.
Read full profile →Why These Peptides?
Semax
Level BSemax is a synthetic heptapeptide derived from ACTH (adrenocorticotropic hormone) developed in Russia. It is registered as a drug in Russia and Ukraine for cognitive enhancement, neuroprotection, and stroke treatment. It is studied for BDNF upregulation, memory enhancement, and anxiolytic effects.
Read full profile >Selank
Level BSelank is a synthetic heptapeptide analog of the immunomodulatory peptide tuftsin, developed in Russia. It is registered as a drug in Russia for anxiety disorders and is studied for its anxiolytic, nootropic, and immunomodulatory properties with a favorable side effect profile.
Read full profile >Dihexa
Level DDihexa is a small molecule peptide analog derived from Angiotensin IV, developed at Washington State University and studied as a cognitive enhancer in animal models. Foundational research on dihexa has been called into question following a 2025 retraction. Until independent replication is published, claims about cognitive enhancement, BDNF analog activity, and HGF/c-Met agonism should be considered unverified.
Read full profile >