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Selank

Tuftsin analog. Selank is Not FDA approved · research chemical; research-chemical versions are not the approved drug.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureUpdated Strongest evidence: Human RCT evidence, 4 of 4
StatusNot FDA approved · research chemicalWADA status unclearFull legal history

Key facts

How we verify
Class
Tuftsin analog
Also called
No common aliases
Vial sizes sold
5 mg, 10 mg
Community-reported sizes
Half-life
Not found
No published half-life found (PubMed search, 2 Oct 2026)
FDA status
Not FDA approved · research chemical
No approved product found
WADA
Unclear
Not named on the 2026 list
Everything on Selank

Selank guides

DosageDoses used in published studies, with the source for each.Side effectsWhat labels and studies report, and what is unknown.CalculatorVial, water and dose to syringe units.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.Half-lifeWhat is measured, by route, and what is not.For depressionWhat research says about Selank for depression.For stressWhat research says about Selank for stress.For sleepWhat research says about Selank for sleep.

Evidence at a glance

Human and animal counts are PubMed records from our evidence ledger (search counts, not studies we reviewed). The grade is the strongest design among the studies we summarised for that goal: a human randomized trial outweighs any number of animal studies.

Selank: studies by condition
ConditionHuman studiesAnimal studiesStudies we summarisedEvidence grade
Depression251Animal evidence, 2 of 4Zhurnal vysshei nervnoi deiatelnosti imeni I P Pavlova 2008, PMID 18661785
StressNot in our ledgerNot in our ledger0No graded study for this goal
Sleep300No graded study for this goal

Grades follow our evidence scale. Summarised studies come from our evidence file, each quote checked against the abstract or label.

Compared with

SelankvsSemaxTuftsin analog next to acth(4-10) analog: evidence, dosing and legal status side by side.PCAC voted 8–5 for 503A (Jul 2026)Read the comparison →

Common stacks

Selank is often sold pre-mixed or combined with other peptides. A few of these pairs appear together in published studies; each stack page lists what was tested, and the pages below cover the math and what each part has been studied for.

Selank + Semax

Common questions

Is Selank FDA approved?

Selank is Not FDA approved · research chemical. Products sold as research chemicals are not the approved drug and are not checked by the FDA.

How much water goes in a 10 mg vial?

That choice only changes the concentration. With 2 mL, the vial is 5 mg/mL. The calculator converts any amount to syringe units. It does the math only and does not suggest a dose.

Sources

  1. 1US search volume and year-over-year trend, Google Keyword Planner export (Jun–Aug 2026 vs 2025)Peptigraph research · 2026peptigraph.com/methodology/Accessed 1 Oct 2026
  2. 2World Anti-Doping Code International Standard Prohibited List 2026World Anti-Doping Agency · 2026wada-ama.orgAccessed 2 Oct 2026
  3. 3United States: No FDA-approved product found: Drugs@FDA (openFDA) search for active ingredient "selank" returned no matches on 2 Oct 2026.U.S. Food and Drug Administration · 2026api.fda.govAccessed 2 Oct 2026
  4. 4US compounding: Selank acetate appears in FDA's table of bulk drug substances previously in category 2 and withdrawn by the nominators.U.S. Food and Drug Administration · 2026fda.govAccessed 2 Oct 2026
  5. 5[Effects of heptapeptide selank on genetically-based and situation-provoked symptoms of depression in behavior in WAG/Rij and Wistar rats, and in BALB/c mice].Zhurnal vysshei nervnoi deiatelnosti imeni I P Pavlova · 2008PMID 18661785Accessed 2 Oct 2026
  6. 6[Optimization of the treatment of anxiety disorders with selank].Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova · 2015PMID 26356395Accessed 2 Oct 2026
  7. 7PubMed search: selank[tiab] (68 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  8. 8PubMed search: selank[tiab] AND (half-life[tiab] OR pharmacokinetic*[tiab]) (4 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  9. 9PubMed search: (selank[tiab] OR semax[tiab]) AND (randomized[tiab] OR patients[tiab] OR clinical[tiab]) (48 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026

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