Which beauty products contains keratin or collagen?

Many beauty products, particularly hair care items, contain keratin, such as shampoos, conditioners, and hair masks designed to strengthen and smooth hair. Collagen is commonly found in skincare products like moisturizers, serums, and face masks, aimed at improving skin elasticity and hydration. Additionally, some dietary supplements and powders also contain collagen to promote skin health from within. Always check product labels for specific ingredients.