L-Cystine CAS:56-89-3

it is known for its role in supporting protein synthesis, cellular antioxidant defense, and hair and skin health.   L-Cystine is often used in cosmetic and skincare products for its potential to promote hair strength and growth, as well as to support skin health.   It is believed to contribute to the formation of keratin, a protein that is a key structural component of hair, skin, and nails.   Additionally, L-Cystine is also utilized in dietary supplements aimed at supporting overall hair and skin health.   Ongoing research continues to explore its potential benefits for these applications.