Tetrapeptide-21 (Leuphasyl)
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Pricing data is updated regularly.
Tetrapeptide-21 is a synthetic peptide that stimulates collagen synthesis and promotes wound healing. It activates TGF-β signaling pathways, enhances fibroblast proliferation, increases extracellular matrix production, and provides anti-inflammatory effects for improved skin health and reduced wrinkles.
| Level | Amount | Frequency | Timing |
|---|---|---|---|
| Beginner | Topical serum 1-2% | Once daily | Evening application |
| Standard | Topical serum 2-5% | Twice daily | Morning and evening |
| Advanced | Injectable 100-200 mcg | 2-3 times per week | Subcutaneous injection |
Ongoing for topical; 8-12 weeks for injectable
Variable based on delivery method
For injectable: Add bacteriostatic water slowly
Cool, dry place or refrigerate
Refrigerate at 36-46°F
Explore peer-reviewed studies and clinical research on Tetrapeptide-21
Peer-reviewed medical research
Active and completed clinical trials
Academic papers and citations
Evidence-based supplement analysis
Research Disclaimer: These links lead to external research databases. Always consult with a qualified healthcare provider before making decisions based on research literature.
This information is provided for educational and research purposes only. It is not intended as medical advice, diagnosis, or treatment recommendation. Consult a licensed healthcare professional before using any peptide. BioProtocol does not sell peptides or pharmaceutical products.