Science
Mechanism of Action
This biomimetic peptide primarily targets and stimulates the synthesis of crucial Extracellular Matrix (ECM) proteins, including collagen types I, III, IV, VII and laminin, within the scalp and skin. This action reinforces the dermal-epidermal junction, thereby strengthening the anchoring of hair fibers and improving overall skin structure. It actively promotes hair regeneration by increasing hair follicle size and extending the anagen (growth) phase of the hair cycle. Furthermore, Acetyl Tetrapeptide-3 reduces micro-inflammation around hair follicles by decreasing pro-inflammatory cytokine production and inhibits the 5-α-reductase enzyme, which modulates dihydrotestosterone (DHT) levels, a hormone critically linked to hair loss. On the skin, it boosts collagen and elastin production, contributing to a visible reduction in wrinkles and fine lines.
Research
Clinical Evidence
High confidence2.5%
Key findings
- 01 When incorporated into a daily serum alongside red clover extract, it increased the anagen (growth phase)/telogen (resting phase) ratio by 46% over 4 months in thirty volunteers with alopecia, leading to significantly denser hair.
- 02 An herbal extract combination featuring Acetyl Tetrapeptide-3, biochanin A, and ginseng extracts demonstrated comparable efficacy to a 3% minoxidil solution, achieving an 8.3% increase in terminal hair counts over 24 weeks for androgenetic alopecia.
- 03 General improvements in hair density and thickness were observed in cases of mild to moderate alopecia when treated with formulations containing Acetyl Tetrapeptide-3.
Transparency
Dusting Analysis
Effective concentrations for Acetyl Tetrapeptide-3 typically range from 0.5% to 5% in cosmetic products, placing it well above levels commonly associated with 'dusting' or sub-efficacious percentages for marketing purposes.
The Formula
Formulation
Stability
For optimal peptide stability, Acetyl Tetrapeptide-3 should be incorporated into formulations below 40°C during cold-hot processes. It is compatible with both water-based and emulsion systems. Aqueous solutions are not recommended for storage beyond one day. For long-term storage (months to years), maintaining -20°C conditions, protected from moisture, direct sunlight, and heat, is advised. Short-term storage (days to weeks) can be at 0-4°C.
Safety
Safety Profile
Acetyl Tetrapeptide-3 is broadly recognized as a safe cosmetic ingredient for topical application, exhibiting gentle action and good tolerability, even on sensitive scalps. European regulations (Regulation (EC) No 1223/2009) do not impose a specific concentration limit for its use in cosmetic products. While generally safe, sensitive individuals may consider a patch test prior to widespread application. It is deemed suitable for use by pregnant and breastfeeding women, and children over the age of 3. Clinical studies involving hair applications reported no localized adverse reactions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Acetyl Tetrapeptide-3 is a valuable biomimetic peptide offering scientifically-backed benefits for enhancing hair density and reducing hair loss, alongside secondary anti-aging effects for the skin, characterized by a favorable safety profile and broad skin compatibility.
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