Palmitoyl Tetrapeptide-7 vs Semax
Side-by-side comparison of key properties, dosing, and research.
Skin & Cosmetic
Palmitoyl Tetrapeptide-7Cognitive Enhancement
Semax- Summary
- 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.
- Semax is a synthetic heptapeptide derived from ACTH developed in Russia. It is a potent nootropic that enhances memory, focus, and provides neuroprotection. Approved in Russia for cognitive disorders, stroke recovery, and traumatic brain injury.
- Half-Life
- Topical penetration-dependent; effects last hours to days
- Minutes (but effects persist for hours via BDNF induction)
- Admin Route
- Topical
- Intranasal, SubQ
- Research
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- Typical Dose
- 2-5 ppm concentration in formulation
- 0.25–1 mg (250–1000 mcg)
- Frequency
- Twice daily
- 1–2 times daily
- Key Benefits
- 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
- Enhances memory and learning
- Improves focus and concentration
- Increases mental energy and motivation
- Provides neuroprotection via BDNF and NGF upregulation
- Reduces cognitive decline
- May alleviate ADHD symptoms
- Supports recovery from brain injury and stroke
- Fast-acting — effects within 30–60 minutes
- Approved in Russia for cognitive disorders and stroke recovery
- Side Effects
- Contact sensitization (rare)
- Well-tolerated at standard concentrations
- Headache (rare, often from higher doses)
- Anxiety or overstimulation at high doses
- Sleep disruption if dosed too late
- Irritability (uncommon)
- Stacks With
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