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Articles, graded by evidence

Plain-English explainers written by our editorial team, medically reviewed, with every source linked.

3 articles

Cognition 5 min

Semax and Selank: where the cognition evidence stands

Two peptides developed in Russia share a stabilizing Pro-Gly-Pro tail. Their English-language clinical record is thin.

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Cognition 6 min

Tesamorelin and cognition in HIV: what the 2025 trial reported

A 2025 Journal of Infectious Diseases paper asked whether a GHRH analog changes cognition in people with HIV and abdominal obesity.

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Cognition 5 min

Pinealon: sleep and cognition claims still rest on a thin English-language record

This short Khavinson-associated peptide is marketed for brain aging. Independent randomized trials remain scarce.

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