9 Rules to Prevent Hair Loss and Thinning Hair

People who sleep 5 hours or less a night have a sixfold higher risk of hair loss. Seven to eight hours of sleep is safest.

Scalp inflammation damages the follicles and can lead to hair loss, thinning hair, premature graying, and frizzy, curly hair.

A damp scalp makes inflammation and dandruff worse. Dry with lukewarm or cool air instead of hot air.

Frequent ponytails or tight headbands can cause traction alopecia, widening the forehead and pushing the hairline back.

Keeping the same part exposes those follicles to sun and dust until they shrink. Move it at least 4 cm (about 1.5 inches) for it to make a difference.

Low iron and vitamin D can cause thinning hair and premature graying. If you're deficient, take supplements consistently.

Bacteria and mold growth can worsen scalp and skin conditions. It's best to change it often.

Losing 1 to 1.5 kg (about 2 to 3 lb) a month is appropriate; rapid weight loss can trigger hair loss.

Frequent coloring causes scalp inflammation and damages the follicles. Bleaching and highlights are especially risky.