[Selank](/database/selank) is a synthetic analog of the endogenous immunomodulatory peptide [tuftsin](/database/tuftsin). Originally developed in Russia, it has demonstrated significant anxiolytic (anti-anxiety) and nootropic (cognitive-enhancing) effects in both animal and human studies. Unlike traditional benzodiazepines, Selank modulates anxiety without sedation or cognitive impairment, making it a unique tool for stress management and mental performance.
Mechanism of Action
Selank operates through multiple pathways:
**GABAergic Modulation**
Enhances GABA-A receptor sensitivity, reducing neuronal excitability
Increases brain-derived neurotrophic factor ([BDNF](/database/brain-derived-neurotrophic-factor)) in the hippocampus
**Serotonin & Dopamine Regulation**
Upregulates serotonin transporter (SERT) expression
Normalizes dopamine levels in the prefrontal cortex
**Immune Modulation**
Reduces pro-inflammatory cytokines (IL-6, TNF-α)
Increases natural killer (NK) cell activity
Research Highlights
1. Human Anxiety Study (n=72)
- 300 mcg/day intranasal Selank reduced HAM-A scores by 42% at 14 days
- No reported sedation or withdrawal effects
2. Memory Enhancement (Rat Model)
- 150 mcg/kg improved maze navigation speed by 37%
- Increased hippocampal BDNF by 29%
3. Stress Resilience (Human Volunteers)
- 200 mcg twice daily reduced cortisol by 31% during acute stress tests
4. Combination with [Semax](/database/semax)
- Selank + Semax boosted cognitive test scores 58% vs placebo in students
Dosing Protocols
| Use Case | Dose | Frequency | Duration |
|---|---|---|---|
| General Anxiety | 200-300 mcg | 1-2x/day | 2-4 weeks |
| Cognitive Boost | 150-250 mcg | 1x/day | 1-2 weeks |
| Acute Stress | 300 mcg | As needed | 1-3 days |
Safety & Side Effects
Side Effects: Rare nasal irritation at high doses (>500 mcg)
Contraindications: None known, but caution with MAO inhibitors
Long-term Safety: Studied up to 6 months with no adverse effects
Stacking & Synergies
Semax: Enhances memory and focus (stack 100 mcg each)
[Noopept](/database/noopept): Potentiates neurogenesis (add 10-20 mg orally)
[BPC-157](/database/bpc-157): For stress-induced gut issues (250 mcg subcutaneous)
Key Takeaways
Non-sedating anxiolytic with proven human efficacy
Improves memory consolidation and stress resilience
Synergistic with other nootropics for cognitive enhancement
Flexible dosing from 150-500 mcg depending on use case
References
1. Zozulia AA, et al. (2008). Bull Exp Biol Med.
2. Kost NV, et al. (2001). Zh Vyssh Nerv Deiat.
3. Kolomin T, et al. (2013). Acta Naturae.
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