P21 vs Syn-Ake
Side-by-side comparison of key properties, dosing, and research.
- Summary
- P21 is a synthetic peptide derived from CNTF (ciliary neurotrophic factor) that promotes hippocampal neurogenesis, enhances memory and spatial learning, and may reduce amyloid-beta pathology. It is used as a neurogenic and cognitive enhancer with potential anti-Alzheimer's applications.
- Syn-Ake is a synthetic tripeptide that mimics waglerin-1, a peptide found in the venom of the Temple viper (Tropidolaemus wagleri). It acts as a reversible antagonist of muscular nicotinic acetylcholine receptors, temporarily reducing facial muscle contraction and smoothing dynamic wrinkles. Often called a 'synthetic Botox' in cosmetic marketing.
- Half-Life
- Not well characterized; likely short, but neurogenic effects persist long after administration
- Not applicable (topical; effect duration hours)
- Admin Route
- SubQ, Intranasal
- Topical
- Research
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- Typical Dose
- 100–500 mcg
- 0.01–0.1% (4–8 mg/g in clinical studies)
- Frequency
- Once daily
- Twice daily
- Key Benefits
- Promotes hippocampal neurogenesis
- Enhances spatial memory and learning
- Increases BDNF expression
- Reduces amyloid-beta plaque formation (animal models)
- Anti-tau pathology potential
- Cognitive enhancement without stimulant effects
- Potential therapeutic for Alzheimer's and cognitive aging
- Reduces depth of dynamic wrinkles and expression lines
- Reversible muscle-relaxing effect on facial muscles
- Smooths forehead lines, crow's feet, and frown lines
- Non-invasive alternative to injectable neurotoxins
- Rapid onset relative to collagen-stimulating peptides
- Well-studied in in vitro and clinical cosmetic trials
- Side Effects
- Generally well tolerated in animal studies
- Limited human clinical data
- Injection site reactions
- Potential mild fatigue at initiation
- Generally very well-tolerated topically
- Rare skin sensitivity or contact dermatitis
- Theoretical neuromuscular effects at systemic doses (not relevant topically)
- Stacks With
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