From basic care and styling to hair loss and going gray, we’ve got the lowdown on your locks
January 15, 2020
Last Reviewed: October 2021
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 strand ar...
The most widespread form of hair loss (androgenetic alopecia, also known as male or female…
My hair seems to be coming out by the handful these days. What might be…
Graying of hair (scientifically known as canities) has genetic roots but affects nearly everyone who…
Q. Do hair dyes cause cancer? The scientific evidence to date is inconsistent and thus…
