Dihexa vs Palmitoyl Tetrapeptide-7
Side-by-side comparison of key properties, dosing, and research.
Cognitive Enhancement
DihexaSkin & Cosmetic
Palmitoyl Tetrapeptide-7- Summary
- Dihexa is a potent experimental oligopeptide derived from angiotensin IV that dramatically enhances synaptogenesis. Preclinical research shows cognitive enhancement orders of magnitude more potent than BDNF — it is considered one of the most powerful nootropic compounds in research, but has very limited human safety data.
- 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
- Unknown (limited pharmacokinetic data)
- Topical penetration-dependent; effects last hours to days
- Admin Route
- Oral, SubQ, Topical
- Topical
- Research
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- Typical Dose
- 5–10 mg
- 2-5 ppm concentration in formulation
- Frequency
- Daily
- Twice daily
- Key Benefits
- Dramatically increases synapse formation (potentially 10 million× more potent than BDNF in animal models)
- Enhances memory and learning
- May reverse cognitive decline
- Improves neuroplasticity and executive function
- Long-lasting cognitive benefits from short courses
- Potential therapeutic agent for Alzheimer's
- 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
- Headache
- Irritability
- Brain fog during washout period
- Unknown long-term effects (insufficient data)
- Contact sensitization (rare)
- Well-tolerated at standard concentrations
- Stacks With
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