Hair: The Long and The Short of It

From basic care and styling to hair loss and going gray, we’ve got the lowdown on your locks


A strand of hair is a complex nonliving structure, containing about 95 percent protein (called keratin, also the building block of fingernails), plus some pigment (melanin) and fats. The thin outer cells of a strand are called the cuticle—a layer of tiny flaps, like scales. Inside the str...

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