Hair loss isn’t always dramatic. It can be incremental. You start noticing a bit more scalp in harsh bathroom lighting; a tiny bald spot when you tie your hair up in a ponytail. The shower drain is more clogged than usual. Not long ago, hair-loss treatments meant topical remedies, supplements, or a flight to Turkey. Luckily, red-light therapy brings the potential for hair regrowth into your home—no clinical appointment required.
Beyond skin rejuvenation, clinical studies suggest red-light therapy can help energize hair follicles, increase blood circulation in the scalp, reduce inflammation, and lower dihydrotestosterone levels—a hormone that causes hair loss and thinning. Red-light therapy also supports adenosine triphosphate (ATP) production, which helps provide oxygen and blood flow to the scalp and triggers follicles to remain in the hair growth phase.
To determine the best red-light therapy for hair growth, I tapped five WIRED tech reviewers who’ve dealt with hair loss themselves. We assessed red-light caps, hands-free helmets with full scalp coverage, and low-level laser therapy (LLLT) or photobiomodulation devices for 16 weeks. Along the way, I reviewed the research, spoke with dermatologists, and tracked ease of use. These are the favorites that produced meaningful results and earned our trust.
Be sure to check out our other wellness and skin care guides, including the Best LED Masks, Best Hair Dryers, and How to Spot Counterfeit Beauty Products on Amazon.
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Updated August 2026: I refined our recommendations and added an Honorable Mentions section. I also added more information to our FAQs, and updated product photos, links, and prices.
How I Test Red-Light Therapy
To start, I consulted board-certified dermatologists and referred to clinical trials to help determine what features to look for when shopping for a device. I test these devices with several tech reviewers on our team, all of whom have personal experience with hair thinning or loss to different degrees. Most of these at-home gadgets call for a 16-week treatment cycle. We follow the brands’ directions and record any visible results along the way.
We monitor changes in hair count, hair density, and scalp health, but effectiveness is only one of the factors we consider. We also judge ease of use, functionality, and comfort. We note the specific wavelengths of light and whether the treatment options feel tolerable or difficult to integrate into everyday routines.
We also prioritize safety, checking for FDA clearance, automatic shut-off features, and overall durability of the design. To date, our testers have not experienced any side effects, but we would have documented them had they.
Best Overall
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Photograph: Molly Higgins
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Photograph: Molly Higgins
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Photograph: Molly Higgins
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Photograph: Molly Higgins
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CurrentBody
LED Hair Growth Helmet
Video: Molly Higgins
CurrentBody’s LED Hair Growth Helmet is a wearable, cord-free, Bluetooth-enabled device designed to improve hair density, thickness, and overall condition. After 12 weeks, I didn’t notice a difference in hair length—I did get a haircut halfway through testing—but I did spot new follicles sprouting along my scalp and sideburn area. My hairstylist mentioned that my hair felt thicker, and I noticed less breakage and hair caught in bristles when brushing. My balding roommate also tested the CurrentBody helmet, and he noted that his hair also felt thicker and that there was new growth around the scalp.
The circular earmuffs protect sensitive ears with a cushy, removable faux leather cloth, and they can be adjusted several inches up or down to ensure a comfortable fit. You can also connect the device to Bluetooth and play any type of audio during sessions, because God forbid I be left alone with my thoughts for 10 minutes a day. My only complaint is that the ear covers aren’t the easiest to adjust and would oftentimes pull out my hair when I removed the helmet. Nevertheless, this is the best red-light therapy for fuller hair. See my full review here. —Molly Higgins
Best Hat
At first glance, the HigherDose Red Light Hat looks like your everyday baseball cap, with a brand logo embroidered across the top—until you notice the little battery cap and controller on the back, or the 120 LED light bulbs lining the inside. While I don’t suffer from natural hair loss, I’ve struggled with trichotillomania since my teens. Part of what initiated the habit is that any time my sensitive scalp gets irritated, the itchiness drives me to pull at the hair around the spot. But in the months I’ve been using the HigherDose hat, I have felt like my scalp has been happier, with fewer irritated spots and overall itchiness, leaving me less likely to reach for my scalp. Last October, after my first month with this device, my hairstylist saw healthier regrowth instead of the breakage she usually sees. In January, she took another look and noted that my usual problem spot on the back of my head had grown in better than ever. She didn’t find any reaction on my scalp either from four months of using the device, and my roots look thicker all around my head.
