What is the role of keratin in the skin?

Keratin plays a crucial role in the structure and function of the skin. It is a fibrous protein that contributes significantly to the protective qualities of the skin. The primary function of keratin is to provide strength and resilience, making the skin more durable against environmental factors such as pathogens, chemicals, and physical stress. This toughening effect is essential for maintaining the integrity of the skin barrier, which protects underlying tissues from damage and dehydration.

Keratin's presence in the outermost layer of the skin, known as the stratum corneum, helps to form a resilient barrier that minimizes water loss while also providing structural support. This contributes to the overall health and appearance of the skin, ensuring it remains firm and less susceptible to injuries.

While hydration, sebum production, and skin color are important aspects of skin health, they are not directly related to the primary function of keratin. Sebum is produced by sebaceous glands and helps with moisture retention, but it does not stem from keratin. Hydration is maintained through other factors, like the skin's lipid barrier and water content. Skin color is primarily determined by melanin production in melanocytes, not keratin. Therefore, the emphasis on keratin's role in providing strength and resilience is