Tripeptide-29 vs Exenatide
Side-by-side comparison of key properties, dosing, and research.
Skin & CosmeticAnti-Aging & Longevity
Tripeptide-29GLP-1 / Weight Loss AgonistsCognitive Enhancement
Exenatide- Summary
- Tripeptide-29 is a pro-collagen cosmetic peptide composed of proline, hydroxyproline, and glycine — the core repeating unit of collagen. Applied topically, it signals dermal fibroblasts that collagen degradation has occurred, triggering compensatory new collagen synthesis.
- Exenatide is a GLP-1 receptor agonist derived from the Gila monster lizard peptide exendin-4, with 53% homology to human GLP-1 and natural resistance to DPP-4 degradation. Available as twice-daily (Byetta) or once-weekly (Bydureon) formulation, it is also being studied for Parkinson's disease neuroprotection.
- Half-Life
- Not applicable (topical)
- ~2.4 hours (Byetta/twice-daily); Bydureon BCISE: weekly via microsphere release
- Admin Route
- Topical
- SubQ
- Research
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- Typical Dose
- 0.01-0.1% in formulation
- 5 mcg, titrate to 10 mcg
- Frequency
- Once or twice daily
- Twice daily
- Key Benefits
- Stimulates fibroblast collagen synthesis via damage-signal mechanism
- Reduces fine lines and improves skin smoothness
- Supports dermal matrix integrity
- Naturally bioidentical to collagen fragment sequences
- Well-tolerated in all skin types
- Synergistic with copper peptides and retinoids
- Blood glucose control in type 2 diabetes
- Weight loss (average 2–3 kg in clinical trials)
- Once-weekly extended-release formulation available
- Reduces appetite and food intake
- Possible neuroprotective in Parkinson's disease (Phase II trials)
- Reduces systemic inflammation
- May protect pancreatic beta cells
- Cardiovascular neutral or potentially protective
- Side Effects
- Excellent tolerability profile
- No documented significant adverse effects at cosmetic concentrations
- Rare sensitivity reactions in individuals with peptide allergies
- Nausea (most common, especially initially)
- Vomiting
- Diarrhea
- Headache
- +4 more
- Stacks With
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