L-Arginine

L-Arginine is an amino acid widely used in cosmetic formulations as a skin conditioning agent and pH adjuster. Naturally present in the skin, L-Arginine supports hydration, improves skin feel, and helps maintain the skin’s protective barrier.

In skincare formulation, L-Arginine is commonly used to neutralize acidic ingredients, adjust formulation pH, and enhance product performance while contributing to overall skin conditioning benefits.

Due to its multifunctional properties, L-Arginine is frequently incorporated into serums, creams, lotions, haircare products, and advanced skincare formulations.

Suitable for professional cosmetic formulators developing performance-driven products.

INCI Name

Arginine

Function

• Amino Acid

• Skin Conditioning Agent

• pH Adjuster / Neutralizing Agent

• Humectant Support

Solubility

Water soluble

Usage Rate

0.1 – 2%

Typical use:

• 0.1–0.5% → pH adjustment

• 0.5–2% → skin & hair conditioning benefits

Recommended pH Range

Effective within pH 4.0 – 7.5

(Commonly used to raise pH slightly.)