A plain-language, continually updated guide from Dr. Matt Chalmers’ clinical reference on hormones and peptides.
Selank is a synthetic peptide modeled on tuftsin, a naturally occurring immune-signaling fragment your body produces from antibodies (IgG), modified with an added sequence for stability. It’s a registered pharmaceutical in Russia for anxiety and neurasthenia (a condition involving fatigue and irritability), developed by the same research tradition responsible for Semax.
Selank interacts with the same GABA-A receptor system that benzodiazepines (like Xanax or Valium) target — but at a different binding site, which is why animal and Russian clinical research describes it as reducing anxiety without the sedation, motor impairment, or dependence risk associated with that medication class. It also increases BDNF in brain regions tied to memory and mood, supports neuroplasticity, and appears to prolong the effects of your body’s own natural opioid-like compounds involved in emotional regulation. One practical note: because Selank engages the GABA system directly, it may make benzodiazepines less effective in someone already using it, since that receptor system is already partially engaged.
Neurotrophic signaling pathways (including BDNF) are supported nutritionally by omega-3 fatty acids, B vitamins, magnesium, and zinc in the general neuroscience nutrition literature — the same foundational nutrients relevant to Semax, since both compounds engage overlapping neurological pathways.
Selank is not FDA-approved for any indication in the United States. It is a registered pharmaceutical in Russia for anxiety and neurasthenia. This page describes research findings only — it is not a claim about effects in humans and not an offer to treat any condition.
Research on Selank, similarly concentrated in Russian scientific literature, has examined its relationship to GABA signaling, the primary inhibitory neurotransmitter system in the brain. It is not FDA-approved in the U.S., and independent replication outside that literature is limited.
Both were developed by the same research tradition and studied for overlapping neurological signaling pathways, though through different proposed mechanisms.
This page draws on The Pillars Path: A Root-Cause Guide to Hormones, Peptides, and Metabolic Health by Dr. Matt Chalmers — Pillars of Wellness’ clinical reference on hormone and peptide therapy.
