Related coverage on hair

The Science of Healthy Hair: Everyday Habits That Protect Strength, Shine, and Scalp Health

External forces, including UV exposure, friction, and heat from everyday tools like hair dryers and straighteners, gradually roughen the cuticle over time, raising the risk of breakage. The scalp, meanwhile, functions much like the skin on your face: it needs consistent, gentle attention to keep follicles functioning well.

Our hair shows that banning lead works

An analysis of hair samples conducted by University of Utah scientists shows precipitous reductions in lead levels since 1916.