Red Light Therapy May Help Men Fight Hair Loss, Here’s What the Science Says

Red light therapy has become one of those wellness treatments that seem to promise a little bit of everything. Better skin, faster recovery, less pain—and, increasingly, more hair.

But when it comes to male-pattern hair loss, there is actually some science behind the hype. The evidence isn't strong enough to call red light a cure for baldness, but research suggests that certain forms of low-level light therapy may help some men grow thicker hair in some cases.

The key is understanding what we're actually talking about. Red light therapy, also known as photobiomodulation or low-level light therapy (LLLT), uses relatively low-energy red or near-infrared light. Unlike laser hair removal, which uses much higher energy to damage hair follicles, photobiomodulation is intended to trigger biological effects rather than destroy tissue.

That distinction matters because not every device marketed as "red light therapy" is doing the same thing.

The Evidence Is Promising, But There's a Catch

There is legitimate research behind using low-level light therapy for androgenetic alopecia , better known as hereditary or male-pattern hair loss. A systematic review and meta-analysis cited in the source looked at 36 studies involving 966 patients and found that red and infrared light therapy improved hair-related outcomes compared with control treatments.

The American Academy of Dermatology has also acknowledged that some studies have found repeated red-light treatments can produce hair regrowth and increases in hair thickness and length for people with hereditary hair loss. But it also makes an important point: results vary, and the treatment isn't going to bring back a full head of hair.

There is also research looking at how red light might affect individual hair follicles. Studies have examined wavelengths around 650–660 nanometers , with some finding improvements in hair density among people with androgenetic alopecia.

Still, that doesn't mean grabbing any red LED gadget and expecting your hairline to return. Wavelength, energy output, treatment time, and the design of the device can all affect the result. Research on at-home devices has found benefits for certain FDA-cleared products , while also highlighting major differences between devices and their treatment parameters.

That's probably the most important takeaway for anyone considering a red-light helmet or cap. The technology shows promise, particularly for hereditary hair loss, but the device and treatment matter.

And if your hair is thinning for another reason, red light may not address the underlying problem at all. It's better viewed as one potential tool for male-pattern hair loss —not a miracle cure for every disappearing hair. If you're noticing hair loss, talk to your doctor or a dermatologist for a proper diagnosis and to figure out which treatment options make sense for you.

This story was originally published by Men's Journal on Sep 10, 2026, where it first appeared in the Health section. Add Men's Journal as a Preferred Source by clicking here.