Red light therapy (LLLT) for hair

How the light helps

Low-level red light is thought to feed energy to the follicle's cells and coax them back into their growth phase, adding count and thickness over months.

What the studies show

Trials report genuine density gains, and several caps and combs are FDA-cleared for hair growth. The benefit is moderate-to-strong — but it lives or dies on consistency.

The devices

Caps and helmets (hands-free and easiest to keep up with), laser combs, and in-clinic panels. A typical routine is a few sessions a week across several months.

Getting your money's worth

It's painless, drug-free, and layers well with minoxidil and finasteride. The only real ask is showing up for the sessions — skip them and results slip away.