Selank

Selank is a synthetic heptapeptide developed in the same Russian research program that produced Semax. It is a modified fragment of tuftsin (a natural immune-regulating peptide) with a Pro-Gly-Pro stabilizing tail. It is used in Russia as a registered anxiolytic medication and is sold elsewhere strictly for laboratory research. Selank is studied for anxiety, stress resilience, immune modulation, and cognitive support.

Selank is the calm-and-clear peptide in the Russian nootropic family. While Semax pushes focus and alertness, Selank reduces anxiety and stress without sedation. Users describe feeling 'unbothered' rather than 'sleepy.' Like Semax, it is taken intranasally and produces noticeable effects within minutes. It is one of the most-discussed anxiolytic research peptides in the world.

Selank modulates GABAergic and serotonergic signaling, increases BDNF expression, and acts on the immune system as a tuftsin analog. It produces anxiolytic effects without binding benzodiazepine sites — no sedation, no dependence profile, no withdrawal in animal studies. It also upregulates expression of monoamine receptors and modulates enkephalin metabolism.

Anxiolytic peptide. Modulates neurotransmitters to curb anxiety without sedation.

1. Selank
2. CNS receptor systems (melanocortin, BDNF, GABAergic or sleep-regulating)
3. Neurotransmitter and neurotrophic signalling
4. Cognition, mood, sleep and libido research endpoints

A plain-English read on how much published evidence currently exists for Selank. These ratings describe the volume and maturity of the literature — not effectiveness, safety, or suitability for any use.

Current limitations: most compounds in this category are studied in preclinical or small-sample settings. Absence of large controlled human trials is the single biggest limitation to keep in mind when reading any summary of Selank.

Lyophilized compounds are supplied as a dry powder. Concentration is simply the total amount in the vial divided by the volume of bacteriostatic water added:

Concentration (mg/mL) = total mg in vial ÷ mL of diluent added

Commonly supplied vial sizes

Nasal spray (typically 0.15% solution)

Worked concentration example

Usually pre-mixed nasal spray.

Run your own numbers with the reconstitution calculator — it converts vial size and diluent volume into mg/mL and mcg/mL.

The figures below are reported here descriptively, because they are the values most frequently cited in publicly available research literature and reference material. They are not instructions, not a protocol, and not a recommendation. These compounds are supplied for laboratory research use only and are not approved by the FDA for human consumption.

Commonly cited amounts

250–500mcg daily intranasally

Commonly cited frequency

Daily as needed

Commonly cited study duration

2–4 weeks

Peptides are supplied freeze-dried because peptide bonds degrade far faster in solution than in a dry state. Understanding storage is part of understanding why the powder form exists at all.

• •Lyophilized powder: stored refrigerated, typically stable for months to years.
• •Reconstituted solution: refrigerated at 2–8°C, generally discussed as stable for roughly 30–60 days.
• •Heat and direct light accelerate degradation — vials are kept cool and dark.
• •Reconstituted material is not re-frozen; ice crystal formation disrupts peptide structure.
• •Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, which is what allows multi-day storage after reconstitution.

More detail in the storage & handling guide and how peptide quality is evaluated.

• •Generalized anxiety disorder (Russian clinical use)
• •Stress resilience research
• •Immune modulation as a tuftsin analog
• •BDNF expression
• •Mild cognitive improvement
• •Opioid withdrawal support

Selank is the default 'anti-anxiety' peptide in nootropic communities — frequently described as 'benzodiazepine-like without the drawbacks.' Users emphasize the non-sedating character and the rapid intranasal onset. Most run short cycles (2–4 weeks) like Semax.

“Russian chill-pill peptide without the brain fog.”

Most commonly combined with Semax for focus + calm in the same protocol. Sometimes paired with DSIP for sleep, or with thymosin alpha-1 in immune contexts since Selank is itself a tuftsin analog.

Selank is a Russian-developed heptapeptide anxiolytic derived from tuftsin, used intranasally for anxiety, stress resilience, and immune modulation. It does not cause sedation or dependence and is sold for laboratory research outside Russia.