How It Works

ReHair devices use low-level red light on the scalp as part of a regular at-home routine. This page explains what the light does, how a session works, and how to build a routine you can keep up.

HOW IT WORKS

How low-level laser therapy supports the routine

ReHair devices deliver low-level red laser light to the scalp. Research on low-level laser therapy has reported improvements in hair density for some adults with androgenetic alopecia.

Category-level evidence does not guarantee a result from every ReHair model or for every person. Follow the instructions for your exact device.

HOW TO USE

Three steps. No guesswork.

Follow the instructions supplied with your exact model. Prepare, use, then power down and store.

Woman preparing dry hair beside a black ReHair laser cap
01 · PREPARE

Clear the path

Start with clean, dry hair and expose the intended scalp area as your instructions describe.

Woman adjusting a connected black ReHair laser cap for a secure fit
02 · FIT & START

Use the supplied setup

Position the cap, connect the approved power setup, and begin as directed for your model.

Woman placing a disconnected black ReHair laser cap on a clean vanity
03 · FINISH

Power down and store

Switch off, disconnect, and store the device clean and dry when the session ends.

WHAT TO EXPECT

Support progress with a routine you can repeat.

Hair growth is gradual and individual. Follow the schedule for your model, use it consistently, and compare photos under the same conditions over time.

Man wearing a black ReHair laser cap while working from home
Build the routine around a time and place you can repeat.
01

Use the schedule for your model

Correct timing and frequency matter more than adding extra sessions.

02

Give the routine time

Hair changes are gradual; avoid judging progress from day-to-day variation.

03

Track visible changes consistently

Match lighting, angle, distance and hair part at each check-in.

04

Review results in context

Individual results vary. If hair loss is sudden, patchy, or concerning, seek qualified advice.

YOUR NEXT STEP

Choose the device that fits your routine.

Prefer hands-free coverage? Start with the cap. Want targeted control? Compare the handheld comb and brush.