Red light therapy: Does it really work?

             Written by: Mantasha

 12 June 2025

Tech entrepreneur Bryan Johnson claims red light therapy (RLT), combined with topical treatments and diet, helped reverse his hair loss and graying within a year.

Bryan Johnson’s Hair Reversal

Photo Credit: Shutterstock

RLT uses low-level red or near-infrared light to stimulate hair follicles and boost skin cell growth. It may reduce wrinkles, spots, and skin sagging.

How RLT Works

Photo Credit: Shutterstock

Beyond hair regrowth, RLT is often used to improve skin appearance and slow visible signs of aging.  

Skin & Hair Benefits

Photo Credit: Shutterstock

Options range from red-light wands, masks, and helmets to caps, combs, and dome-like devices, each targeting specific needs.

Types of RLT Devices

Photo Credit: Shutterstock

Some studies support RLT for skin and hair growth benefits. However, experts emphasize that more robust research is needed to confirm these effects.

What the Science Says

Photo Credit: Shutterstock

Generally considered safe short-term, RLT can cause mild side effects like skin irritation or brief discomfort.

Safety & Side Effects

Photo Credit: Shutterstock

Consult a dermatologist before using RLT. Following device guidelines (session duration, frequency, and intensity).

Precautions

Photo Credit: Shutterstock