Evidence-led peptide reference
Selank research guide
Updated 10 October 2026 · Editorial standards
A tuftsin-derived synthetic peptide investigated in stress, anxiety and neuroimmune research.
Identity and context
What is Selank?
Selank is a synthetic heptapeptide derived from tuftsin, a naturally occurring tetrapeptide involved in immune function. The added sequence was designed to alter stability and biological behaviour while retaining links to tuftsin-related signalling.
It is commonly marketed online using the language of anxiety relief, calm or cognition. Those descriptions should not be confused with authorisation, a diagnosis-specific treatment recommendation or a guarantee of effect.
Mechanism under investigation
How is Selank studied?
Experimental work has examined GABA-related gene expression, neurotransmitter systems, immune signalling and peptide metabolism. The proposed picture is neuroimmune rather than a single-receptor sedative mechanism.
Gene-expression changes and behavioural effects in animals are hypothesis-generating. Anxiety disorders in people are heterogeneous and require evidence from well-controlled, independently replicated clinical trials.
Research map
Main areas of interest
Anxiety and stress models
Behavioural studies examine stress responses and anxiety-like behaviour, predominantly in experimental settings.
Neurotransmitter research
Studies investigate GABAergic and other signalling systems without establishing a simple one-pathway explanation.
Neuroimmune biology
Its tuftsin relationship has prompted research into interactions between immune and nervous-system signalling.
Strength of evidence
What does the evidence actually show?
Evidence is separated by level because a cell experiment, an animal model, a human trial and a regulatory decision answer different questions.
Critical reading
Limitations and unanswered questions
- Animal anxiety-like behaviour is not equivalent to a diagnosed human anxiety disorder.
- A narrow research base increases the need for independent replication.
- Intranasal delivery claims depend on formulation and pharmacokinetic evidence.
- Online testimonials are not controlled evidence and cannot establish safety.
Analytical context
What a certificate of analysis can—and cannot—tell you
A certificate of analysis is a report about the particular submitted sample and tests named on that report. It can help document identity, measured amount or purity when suitable methods were used. It does not prove that every batch is identical, that a material is sterile or endotoxin-free, that it is clinically effective, or that it is approved for human use.
No product-specific COA is currently linked to this guide. Absence of a displayed report should not be interpreted as analytical verification.
Learn how to read a peptide COA →Questions answered
Selank FAQs
What is tuftsin?
Tuftsin is a naturally occurring four-amino-acid peptide associated with immune-cell activity. Selank is a longer synthetic analogue derived from it.
Is Selank an approved anxiety medicine in the UK?
No.
Does Selank work like a benzodiazepine?
It should not be assumed to. Research discusses several neuroimmune and neurotransmitter pathways, and direct clinical equivalence has not been established.
Are cognition claims proven?
No. Evidence is limited and does not support guaranteed improvements in memory or focus.
Primary and authoritative reading
Sources and further reading
Sources are provided so readers can inspect the underlying literature and current official information. Inclusion does not mean every claim in a paper has been independently confirmed.
- PubMed Selank literature ↗Indexed primary studies and reviews for critical appraisal.
- ClinicalTrials.gov Selank search ↗Official registry search showing the limited clinical-trial landscape.
Source and wording review: 7 October 2026. Prepared with AI assistance; no independent clinical review is claimed. Read the editorial policy or suggest a correction.