Selank vs Palmitoyl Tetrapeptide-7
Side-by-side comparison of key properties, dosing, and research.
Cognitive Enhancement
SelankSkin & Cosmetic
Palmitoyl Tetrapeptide-7- Summary
- Selank is a synthetic heptapeptide analog of tuftsin developed in Russia. It is a potent anxiolytic that reduces anxiety and enhances cognitive function without sedation or addiction. It is approved for clinical use in Russia for anxiety disorders.
- Palmitoyl Tetrapeptide-7 (Rigin) is a cosmetic peptide consisting of palmitic acid linked to the tetrapeptide sequence GQPR (Gly-Gln-Pro-Arg). It was designed to mimic the biological activity of the IgG immunoglobulin C-terminus, which downregulates the production of interleukin-6 (IL-6), a key driver of skin aging and inflammation.
- Half-Life
- Minutes (but effects persist for hours)
- Topical penetration-dependent; effects last hours to days
- Admin Route
- SubQ, Intranasal
- Topical
- Research
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- Typical Dose
- 250–500 mcg
- 2-5 ppm concentration in formulation
- Frequency
- 1–3 times daily
- Twice daily
- Key Benefits
- Reduces anxiety without sedation
- Enhances memory and learning
- Improves focus and concentration
- Stabilizes mood
- Reduces physiological stress response
- May enhance motivation
- No addiction potential or withdrawal
- Fast-acting — effects within 20–30 minutes
- Approved clinically in Russia for anxiety disorders
- Reduces IL-6 inflammatory cytokine in skin
- Prevents 'inflammaging' of the skin
- Inhibits MMP collagen-degrading enzymes
- Synergistic with Matrixyl for anti-aging
- Clinically tested for wrinkle and skin texture improvement
- Well-tolerated topically
- Side Effects
- Mild sedation at higher doses (paradoxical)
- Fatigue (rare)
- Irritability during discontinuation (uncommon)
- Contact sensitization (rare)
- Well-tolerated at standard concentrations
- Stacks With
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