Quick Facts

• Red light therapy market projected to reach $1.13 billion by 2033 with 9.8% annual growth
• Clinical studies show modest improvements in hair growth and fine lines after months of consistent use
• FDA-cleared devices are safe but not necessarily effective, with prices ranging from $50 to thousands

Red light therapy delivers real benefits for hair growth and skin improvement, but the science doesn’t support many social media claims, according to new research and expert analysis.

The global red light therapy market reached $533.8 million in 2025 and is projected to hit $1.13 billion by 2033. Red light devices now account for 36% of the light therapy market.

Hair Growth Shows Measurable Results

Dr. David Ozog from Henry Ford Health Detroit says red light therapy works for hair growth. “You can objectively look at the hairs, the quality of the hairs, the number of hairs, and they improve,” Ozog said.

But expectations should be realistic. “It’s not going to take you from being bald to being a Chia pet and having abundant hair,” Ozog warned.

Skin Benefits Are Modest

Dr. Zakia Rahman from Stanford School of Medicine reports evidence shows red light therapy can help with fine lines and wrinkles. The effects are modest compared to aggressive treatments like laser peels.

“There’s real evidence that shows red light can change biology,” Rahman said. “But that’s not the same as saying it’s some kind of panacea for many different health conditions.”

How It Works

Red light wavelengths between 630 and 660 nanometers penetrate skin and are absorbed by an enzyme called Cytochrome C Oxidase. This process emerged from 1960s research when Hungarian scientists accidentally discovered low-level red light stimulated hair growth in rodents.

Results take time. Experts say benefits require months of consistent use several times per week, not days.

Safety and Regulation Concerns

Unlike UV light, red light doesn’t cause cancer. The most common side effects are mild pain or skin irritation.

Many devices are FDA-cleared for safety but not effectiveness. Ozog tested some devices that didn’t produce enough energy to have any effect. “The buyer beware advice is it’s a little bit like the Wild West,” he said.

Market Innovation in 2026

Major companies launched new products this year. In March, Solawave expanded its FDA-cleared LED ecosystem. L’Oréal unveiled AI-assisted skin optimization technology in January.

Device prices range from $50 to thousands of dollars. New devices include AI-based skin checks that measure moisture levels and adjust light intensity accordingly.

Social media platforms like TikTok feature creators claiming benefits for everything from joint pain to period cramps, but medical evidence supports only specific uses like pattern hair loss and certain types of ulcers.

Read more: Can red light therapy really deliver a beauty and health glow up? Here’s the science