Structure
Amino acid chains in keratin proteins determine their function and structure. In general, these chains look very similar in specific species. Humans have similar sequences of amino acids with rats and bovine species. Keratin is not dissolvable in alkalines, acids, solvents, or water. This means its structure mostly stays unchanged when exposed to many chemicals and components in the body. Keratin proteins need water to retain the overall function and size. For instance, when you put a wool sweater, which is full of keratin, into heated water, it will shrink immediately. This is because molecular bonds in these proteins break at high temperatures, which makes them lose their length. [3]
Benefits
People often use keratin products or supplements to improve the look and health of their nails and hair. In many cases, they report that their hair becomes smoother and simpler to manage. However, these effects can vary, mostly depending on which form of keratin treatment you use, which natural thickness of the hair is, and whether the hair is healthy. Keratin is able to smooth down the follicle cells that overlap to form hair strands. Hair cuticle or layers of cells can absorb keratin, which makes them look glossy and full. Also, keratin may make your hair straighter, easier to manage, and less frizzy. [4]
