Keratin is a type of what?

Keratin is classified as a fibrous protein, which is significant due to its structural role in the body. Fibrous proteins are characterized by their long, thread-like structures and provide strength and support to various bodily tissues. In the case of keratin, it is an essential component found in hair, nails, and the outer layer of skin, where it serves to protect cells and help maintain the integrity of these structures against physical damage and environmental factors.

Understanding keratin as a fibrous protein is crucial in cosmetology, as it directly relates to hair and nail care. Treatments and products often aim to strengthen or repair keratin, thus enhancing the health and appearance of hair and skin. The nature of keratin’s composition makes it resilient and provides vital functions in protective barriers, differentiating it clearly from other biomolecules such as amino acids, carbohydrates, and fatty acids, which serve other roles in metabolism or energy storage.