CYSTINE

Ingredient type:  HUMECTANT/WATER-SOLUBLE

Amino acid

✨ Role: Cystine is an essential amino acid formed from two cysteine molecules linked by a disulfide bridge. It plays a crucial role in strengthening the structure of skin and hair proteins, contributing to their strength and elasticity.

Ingredient type: Water-soluble

‍⚕️ Safety: Yes, cystine is considered safe for use in cosmetic products.

✨ Vegan: If it is synthetic or plant-based, it can be considered vegan. Its source as specified in the product is therefore important for this assessment.

✨ Good to know: Cystine is often included in formulations designed to strengthen and repair hair, particularly after chemical treatments or environmental damage.

Found in: Mainly used in hair care products such as shampoos, conditioners, and repair masks, but also in certain skin care products for their restructuring properties.

Comedogenic rating: