Cystine ek sulfur-containing amino acid hai jo cysteine ke do molecules se banta hai. Skincare aur haircare mein isse conditioning agent ke taur pe use hota hai. Yeh keratin structure ko support karta hai aur antioxidant defense mein madad deta hai. Naturally yeh skin aur hair proteins mein paya jata hai aur generally safe maana jata hai.