Keratin is a protein.
Keratin is a fibrous structural protein found in hair, skin, and nails. It is not a vitamin. Vitamins are organic compounds that are essential nutrients that the body needs in small amounts.
Here's a breakdown:
- Keratin:
- A type of protein.
- Provides structural support and protection.
- Found in hair, skin, nails, hooves, horns, and feathers.
- Vitamins:
- Organic compounds.
- Essential for various bodily functions.
- Examples: Vitamin A, Vitamin C, Vitamin D, etc.
Therefore, the definitive answer is that keratin is a protein, not a vitamin.
