Keratin essentially allows the outer shell of our body to remain healthy. Damage to the external layer of keratin can cause skin, hair, and nails to look unhealthy or flaky. Keratin is an extremely strong protein which is a major component in our skin, hair, and teeth. Without Keratin, our body would easily take more damage and simply not last as long.
Keratin is essentially a protein made out of certain amino acids that make skin, hair and nails strong and flexible.
The outer layer we can touch, like skin, hair and nails (hooves, horns, beaks and claws in non-human animals) is actually dead keratin, or keratin filled sacs. This is the normal mode of production, because as keratin is produced, the dead cells are pushed upward as a protective layer. Hair and nails protect sensitive parts of the epidermis and keep dust and particles from entering the body, and skin is arguably the most important organ in the human body, protecting organs from damage through its flexibility and durability. Keratin is like the outer armor for all our important parts.
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