What is keratin and where is it found?

Keratin is a type of protein that plays a crucial role in the structure and function of various parts of the body, particularly in hair, skin, and nails. It is a fibrous structural protein that provides strength, durability, and protection. In hair, keratin helps to form the hair shaft and contributes to its overall strength and texture. In the skin, it acts as a protective barrier, helping to prevent water loss and shield against environmental damage. Similarly, in nails, keratin gives them their hardness and resilience.

The focus on keratin being a protein rather than a vitamin, lipid, or mineral is essential in understanding its biological function. Vitamins, lipids, and minerals play different roles in bodily functions, but keratin’s primary identity as a protein distinguishes its importance in the structural integrity of hair, skin, and nails. This understanding is vital for those studying cosmetology, as treatments and products aimed at improving the health and appearance of hair, skin, and nails often focus on supporting or enhancing keratin levels.