Can Red Light Therapy Stop You from Going Bald?
For many men, hair loss sits in a weird gray zone between denial and obsession. (That is, unless you swallow your pride and lean into embracing your balding era.) And while many options exist to address thinning hair, red light therapy is a relatively new course of action. The treatment promises regrowth without pills, needles, or awkward conversations at the pharmacy counter. It almost sounds too painless to work. So does it?
Before you break out your credit card and strap LEDs to your scalp, it’s worth investigating what the science actually says about red light therapy for hair loss.
How red light therapy works for hair
It’s no surprise that red light therapy is having a moment. Perhaps you already have a panel at home and bask in its glow to combat inflammation, promote healthier skin, or boost athletic recovery. But it turns out that its claims for hair health are among the most vetted in the space.
Red light therapy (aka low-level light therapy, or LLLT) is marketed as a way to stimulate hair growth, increase hair thickness, and slow the progression of thinning. According to James Kilgour, MD, a board-certified dermatologist at Golden State Dermatology in Sacramento, California and founder of KilgourMD, it works through a process called photobiomodulation. “In simple terms, specific wavelengths of red or near-infrared light are thought to interact with mitochondria inside cells, leading to increased cellular energy production and downstream signaling effects,” he says. “These signals may promote a shift of hair follicles into the anagen (growth) phase and potentially extend that growth phase.”
Small placebo-controlled studies to date—including those involving participants with androgenetic alopecia (pattern hair loss)—show modest improvements in hair growth, density, and thickness.
Who are the best candidates for treatment?
LLLT shows the most promise for those experiencing early thinning, says Dr. Kilgour. Ken Anderson, MD, a triple board-certified hair restoration surgeon and adjunct clinical professor of dermatology at Emory University School of Medicine, reminds us of the sobering truth that hair loss has no cure and gets worse over time. “Red light therapy is intended to combat that progression, allowing someone to retain as much hair as possible for as long as possible by postponing the complete loss of the affected hair follicles,” he says. “A minority of patients will regrow a modest amount of hair. But for most, what we’re looking for is to slow down the inevitable.”
He adds that red light therapy won’t wake up hair follicles that have already died. In other words, if you’ve been bald in one area for years, it’s bound to stay that way.
Should you try it for yourself?
It can be worth a shot—mainly as a complement to other vetted solutions if you’re in the earlier stages of hair loss. “For patients with true pattern hair loss, the most reliable results still come from therapies with stronger long-term evidence, such as topical minoxidil and, in appropriate male patients, oral finasteride,” says Dr. Kilgour. According to a 2022 review, combining LLLT with minoxidil may produce better results in treating androgenetic alopecia than either option on its own.
If you’re going to test the waters, you’ll want to invest in a red light cap or helmet from a reputable company. (A standard red light panel won’t target your scalp as effectively as devices engineered specifically for hair. Meanwhile, red light combs require more effort and thus may lead to less compliance.) Dr. Anderson advises looking for FDA–cleared devices with at least 272 laser diodes and wavelengths of 630 to 680 nanometers. He says you shouldn’t skimp and go for no-name brands on Amazon, as they’re bound to be underpowered and thus a waste of your money. Some caps from popular wellness brands retail at around $449, though Dr. Anderson says worthy competitors can creep up to the four-figure mark.
