WHAT IS HAIR MADE OF?

Hair is made of skin cells. A hair grows from a root under the skin. The hair grows up inside a shaft through the layers of skin. The part of the hair that you see is made of dead cells.

The colour of hair, like the colour of skin, comes from melanin. Melanin is made in the hair root. The hair of older people turns grey because the root stops making melanin.

The shape of the hair shaft gives you straight or curly hair. A round shaft makes straight hair. An oval-shaped shaft makes wavy hair. A comma-shaped shaft makes curly hair.