Red light therapy (LLLT) for hair

How light helps

Low-level red light is believed to energize the follicle's cells and move them into growth mode, building count and thickness over months.

The evidence

Trials show real density gains, and several caps and combs hold FDA clearance for growth. The payoff is moderate-to-strong, as long as you stay consistent.

Devices

Caps and helmets (hands-free, easiest to keep up), laser combs, and clinic panels. A common schedule is a few sessions a week over several months.

Making it work

Painless and drug-free, it stacks neatly with minoxidil and finasteride. The catch is just doing it — skip sessions and the gains fade.