Keratin is the material in skin cells that provides protection from abrasions, water damage, and microorganism entry.
The outer layer of your skin, nails, and hair are all made of a protein called keratin (epidermis). It promotes skin health, speeds up wound recovery, and maintains strong hair and nails. For vertebrates, it is the main constituent of their scales, hair, nails, feathers, horns, claws, and outer layer of skin.
Epithelial cells are likewise shielded from harm or stress by keratin. In both water and organic solvents, keratin is incredibly insoluble. In order to prevent epithelial cells from rupturing and dying, keratin IFs play a critical role in protecting them from mechanical and non-mechanical stressors. Protective proteins like keratin are less likely to be torn or scratched than other cell types your body makes.
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