Best Red Light Therapy for Hair Growth: WIRED-Approved (2026)

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, research suggests 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 three WIRED tech reviewers who’ve dealt with hair loss themselves. We assessed red light therapy caps, hands-free helmets with full scalp coverage, and low-level laser therapy or photobiomodulation devices for 16 weeks. Along the way, we 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 hair care guides, including Best Dry Shampoos, Best Heat Protectant Sprays, and Best Hair Dryers.

Best Red Light Helmet

CurrentBody’s LED Hair Growth Helmet is a wearable, cord-free, Bluetooth-enabled device aimed at improving hair’s density, thickness, and overall condition. Each panel on the helmet has 12 red lights (120 total), which are on a spectrum of 620 to 660 nanometers (nm). The 620-nm red light helps improve scalp health by promoting circulation, and the 660-nm red light penetrates deeper, reaching through the epidermis and dermis to the hypodermis, where it stimulates growth and repair at the follicle root. According to CurrentBody, you only need to use the device for 10 minutes a day, and you’ll see results within 12 weeks.

My hair grows famously slow. I got a pixie cut in the spring of 2011, and my hair did not touch my shoulders until the end of 2013. My hair is also super fine. It tangles easily and often breaks off (my ends are chronically dry and split). After 12 weeks, I didn’t notice a huge difference in length (and I got a haircut halfway through testing), but I did notice that my hair seemed to be sprouting new follicles along my scalp and sideburn area in particular. I started to see small baby hairs along my hairline that I had never seen before. My stylist commented that my hair felt thicker, and I noticed less breakage and hair caught in bristles when brushing. My balding roommate also tested it (although not daily like me) and said that his hair felt thicker and that there was new growth around the scalp.

The helmet comes in two sizes: medium for a skull circumference of 21.3 to 23.2 inches, or large, for 23.3 to 25 inches. (I opted for medium, and it was too large for my head size.) The device sits on a base and is charged via a USB-C cord. It takes about three hours to fully charge, and it stays on a single charge for about a week. The device is powered on by the press of the single button located under the charging port. 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. The screen on the right earmuff indicates the time left in the treatment session, and the helmet automatically turns off when the 10 minutes are up. You can also connect the device to Bluetooth and play any type of music or video while wearing it, because God forbid I be left alone with my thoughts for 10 minutes a day. Just make sure your hair is clean and dry before use.

My only complaints are that the ear covers aren’t the easiest to adjust while wearing and would oftentimes pull out my hair while I removed or adjusted the helmet. Nevertheless, this is the best red light therapy for hair growth. Just you wait, I’ll look like Fabio on the cover of a romance novel by next year. See full review here. —Molly Higgins