Selank
Medium EvidenceA synthetic peptide analog of tuftsin studied for anxiolytic and nootropic properties.
What It Is
Selank is a heptapeptide developed at the Institute of Molecular Genetics of the Russian Academy of Sciences. It is a synthetic analog of the immunomodulatory peptide tuftsin, with an added Pro-Gly-Pro sequence for stability. It has been studied for anxiolytic, nootropic, and immunomodulatory effects. In 2026, laboratory programs are examining how Selank interacts at the receptor level within the BDNF-TrkB and GABAergic signaling systems, with improved analytical instrumentation making preclinical research more precise and reproducible. Advances in nasal and transdermal delivery mechanisms have also improved bioavailability studies. Selank is commonly studied alongside Semax in cognitive peptide research stacks. It is registered as an anxiolytic in Russia but has no FDA approval and is not currently scheduled for PCAC review in the July 2026 sessions.
Regulatory Status
Returned to Category 1 compounding eligibility under FDA's February 2026 reclassification. May be compounded by 503A/503B pharmacies under physician prescription.
Effective: February 2026
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Commonly Discussed Benefits
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Safety & Cautions
- Approved in Russia but not FDA-approved in the US
- Most research published in Russian-language journals
- Long-term Western clinical data limited
- Discuss with a healthcare provider
Comparisons
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Medium EvidenceAn 11-amino-acid CNTF-derived peptide studied for its ability to upregulate BDNF expression and promote neurogenesis in cognitive decline models.
Semax
Medium EvidenceA synthetic peptide derived from ACTH, studied for cognitive enhancement and neuroprotective effects.
Trontinemab
Medium EvidenceAn investigational, brain-penetrant anti-amyloid antibody from Roche/Genentech that uses the proprietary 'Brainshuttle' transferrin-receptor delivery system to reach the brain far more efficiently than conventional antibodies. Trontinemab (development codes RG6102 / RO7126209) is a 2+1 bispecific molecule: it fuses the amyloid-beta-clearing antibody gantenerumab to a fragment that grabs transferrin receptor 1 (TfR1) on blood-brain-barrier cells, hitching a ride into the brain via the same receptor-mediated transport that carries iron. That shuttle lets a low intravenous dose clear amyloid plaques rapidly and deeply while triggering strikingly little of the brain swelling and micro-bleeding (ARIA) that limits approved anti-amyloid drugs. In the Phase Ib/IIa Brainshuttle AD study (NCT04639050), the 3.6 mg/kg dose removed roughly 107 centiloids of amyloid after 28 weeks, driving about 91-92% of participants below the amyloid-positivity threshold (24 centiloids) - with ARIA-E seen in fewer than 5% of participants, well below the ~13% reported for lecanemab and ~24% for donanemab. On the strength of those data, Roche launched two identical pivotal Phase 3 trials - TRONTIER 1 and TRONTIER 2 - in early symptomatic Alzheimer's disease (about 1,600 patients across 18 countries, begun in 2025), and at the 2026 Alzheimer's Association International Conference (AAIC) in London it unveiled PrevenTRON, a Phase 3 prevention trial in 1,600 cognitively unimpaired people at high risk (elevated plasma p-tau217). Trontinemab is a prescription-stage investigational biologic - it is not approved anywhere and is not a supplement or research chemical.