Acetyl Decapeptide-3 is a synthetic cosmetic signal peptide used in skincare products for anti-aging and skin-repair support. It is primarily included in serums, creams, and professional cosmetic formulations aimed at improving skin quality rather than treating medical conditions.

1. Name & Classification

• INCI / Common name: Acetyl Decapeptide-3

• Type: Synthetic peptide (decapeptide = 10 amino acids)

• Category: Biomimetic / signal peptide

• Primary use: Cosmetic anti-aging ingredient

• Marketed forms: Often found in multi-peptide complexes (e.g., anti-wrinkle blends)

2. Origin

• Developed through peptide engineering and biomimetic design

• Inspired by natural extracellular matrix signaling fragments

• Designed to mimic skin repair communication signals

3. Molecular Characteristics

• Length: 10 amino acids (decapeptide)

• Modification: N-terminal acetylation (Ac- group)

• Molecular weight: ~900–1300 Daltons (varies by sequence)

• Structure: Linear peptide chain (not cyclic)

4. Physical Properties

• Appearance: White to off-white powder (pure form)

• Solubility: Highly soluble in water

• Stability: Moderate (sensitive to heat, pH extremes, and enzymes)

• Best storage: Cool, dry, protected from light (often refrigerated in bulk form)

5. Primary Cosmetic Functions

• Supports collagen and extracellular matrix activity

• Helps improve skin firmness and elasticity

• Reduces appearance of fine lines and wrinkles

• Promotes skin repair and renewal processes

• Contributes to overall skin texture improvement

6. Mechanism Type (Simple Summary)

It works mainly by:

• Sending “repair signals” to fibroblast cells

• Encouraging increased production of structural skin proteins

• Supporting gradual skin remodeling over time

7. Applications

Commonly used in:

• Anti-aging serums

• Firming creams

• Eye-area skincare products

• Multi-peptide cosmetic blends

8. Evidence Level

• In vitro (lab studies): Moderate support for fibroblast activity

• Cosmetic studies: Some supportive results in skin texture improvement

• Clinical trials: Limited independent large-scale research

9. Safety Profile

• Generally considered safe for topical cosmetic use

• Low irritation potential

• No known systemic toxicity at cosmetic concentrations

• Not intended for injection or medical use

10. Key Takeaway

Acetyl Decapeptide-3 is a cosmetic signaling peptide designed to support skin structure and anti-aging effects by enhancing fibroblast activity and extracellular matrix maintenance, with effects that are gradual and mild to moderate depending on formulation quality.