Cysteine

Product Description

Cysteine is a sulfur-containing amino acid widely used in cosmetic and personal care formulations. As an important precursor involved in antioxidant defense systems, it helps support healthier-looking skin and hair appearance. This multifunctional ingredient provides antioxidant, conditioning, and protective benefits while helping improve overall skin comfort and hair manageability. Ideal for antioxidant, protective, skin-conditioning, and hair care cosmetic formulations.

Product Specification

• INCI Name: Cysteine
• Synonyms: L-Cysteine
• CAS No.: 52-90-4
• Appearance: White crystalline powder
• Active Content: ≥98% (Typical)
• Source: Amino Acid
• Solubility: Soluble in water
• Stability: Stable under normal cosmetic formulation conditions; protect from prolonged air exposure
• Origin: China

Key Benefits & Applications

Cysteine provides scientifically supported benefits for cosmetic formulations:

• Antioxidant: Helps reduce oxidative stress caused by environmental exposure
• Free Radical Scavenger: Supports protection against free radical damage
• ROS Inhibitor: Helps support skin defense against reactive oxygen species
• Hair Bonding/Repair: Helps improve the appearance of dry and damaged-looking hair
• Anti-Pollution & Protection: Helps protect skin and hair from environmental stress exposure
• Applications: Suitable for shampoos, conditioners, serums, masks, protective skincare products, and hair care formulations

Formulation Guidelines

Recommended for aqueous-based cosmetic and hair care formulations. Ensure proper incorporation and stability for optimal efficacy:

• Solubilization: Dissolve in water phase before combining with other ingredients
• pH Range: Maintain between 4.0 - 7.0 for optimal stability
• Temperature: Avoid prolonged exposure to temperatures above 60°C during formulation
• Synergy: Combine with Glutathione for enhanced antioxidant and protective benefits