MOLECULAR INFORMATION
Molecular information
- Weight
- 751.9 Da
- Length
- 7 amino acids
- Type
- Synthetic heptapeptide · tuftsin analogue · claimed anxiolytic + nootropic
- Formula
- C₃₃H₅₇N₁₁O₉
Amino acid sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro Selank is a Russian-developed heptapeptide analogue of the endogenous immune peptide tuftsin. Authorised in Russia for generalised anxiety disorder since 2009; not authorised anywhere in the EU, UK or US. Marketed online for anxiolytic and cognitive-enhancement claims.
Claims vs evidence
- Anxiolytic effect — Russian Phase III data, small Western pilot studies
- Nootropic / cognitive uplift — limited preclinical support
- Immune-modulating effects — animal-model evidence
Why we grade it C
A handful of moderate-sized Russian trials suggest a real anxiolytic signal, but the studies are not independently replicated outside their source country, and the regulatory file has not been submitted to EMA. Sold widely in grey-market peptide channels in the EU despite restricted-substance classification in NL and DE. Plausible but unproven outside its origin jurisdiction.