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Selank Dosage: Doses Studied, Units and Chart

What doses of Selank have been used in published research, how they convert to syringe units, and what is still unknown.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureTuftsin analogUpdated
Doses studied
5 studies
with a stated dose, listed below
Frequency
Varies by study
as used in studies
Half-life
Not found
No published half-life found (PubMed search, 2 Oct 2026)
Vial sizes sold
5 mg, 10 mg

Doses used in published studies

Each dose below is quoted from a study abstract, strongest design first. Animal doses are labelled and do not translate directly to people. None of them is a recommendation.

Doses of Selank used in published studies
DoseFrequency and routeStudy typeSource
0.3 mg/kg a daydaily · intraperitoneal · 7 daysAnimal · rat (not a human result)Bulletin of experimental biology and medicine 2019, PMID 31625062
300 μg/kg/daydaily · intranasal and intraperitoneal · 5 daysAnimal · mouse (not a human result)Eksperimental'naia i klinicheskaia farmakologiia 2016, PMID 29787664
300 microg/kgsingle injection after the 10th trialAnimal · rat (not a human result)Eksperimental'naia i klinicheskaia farmakologiia 2010, PMID 20919548
300 microg/kgrepeated, 15 min before training sessions · four daysAnimal · rat (not a human result)Neuroscience and behavioral physiology 2003, PMID 14552529
100 micrograms/kgNot stated in the abstractAnimal · mouse (not a human result)Bulletin of experimental biology and medicine 2002, PMID 12432865

Dose to syringe units

For a 10 mg vial mixed with 2 mL of bacteriostatic water (5 mg/mL), on a U-100 syringe. These are reference amounts for the math, not suggested doses.

100 mcg
2 u
250 mcg
5 u
300 mcg
6 u
500 mcg
10 u
750 mcg
15 u
1000 mcg
20 u
Use your own vial and water

Before anyone considers it

  • Selank is Not FDA approved · research chemical; research-chemical versions are not the approved drug.
  • Compounded and research-chemical versions are not the approved product and are not checked by the FDA for identity, purity or dose.
  • Reconstitution math (mg vs mcg, units vs mL) is the most asked question in peptide forums. Check every number twice.
  • People who are pregnant, breastfeeding, or have a chronic condition need medical advice first.

Common questions

How many units is 300 mcg of Selank?

It depends on the water added. A 10 mg vial with 2 mL of water gives 5 mg/mL, so 300 mcg is 6 units on a U-100 syringe. Use the calculator for other mixes.

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.

More on Selank

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.

Sources

  1. 1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
  2. 2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026
  3. 3Selank, Peptide Analogue of Tuftsin, Protects Against Ethanol-Induced Memory Impairment by Regulating of BDNF Content in the Hippocampus and Prefrontal Cortex in Rats.Bulletin of experimental biology and medicine · 2019PMID 31625062Accessed 2 Oct 2026
  4. 4[COMPARISON OF PHARMACOLOGICAL EFFECTS OF HEPTAPEPTIDE SELANK AFTER INTRANASAL AND INTRAPERITONEAL ADMINISTRATION TO BALB/c AND C57BL/6 MICE.].Eksperimental'naia i klinicheskaia farmakologiia · 2016PMID 29787664Accessed 2 Oct 2026
  5. 5[Experimental optimization of learning and memory processes by selank].Eksperimental'naia i klinicheskaia farmakologiia · 2010PMID 20919548Accessed 2 Oct 2026
  6. 6The optimizing action of the synthetic peptide Selank on a conditioned active avoidance reflex in rats.Neuroscience and behavioral physiology · 2003PMID 14552529Accessed 2 Oct 2026
  7. 7Effects of Selank on behavioral reactions and activities of plasma enkephalin-degrading enzymes in mice with different phenotypes of emotional and stress reactions.Bulletin of experimental biology and medicine · 2002PMID 12432865Accessed 2 Oct 2026
  8. 8PubMed search: selank[tiab] (68 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  9. 9PubMed search: selank[tiab] AND (half-life[tiab] OR pharmacokinetic*[tiab]) (4 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  10. 10PubMed 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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