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A few years ago, red light therapy started showing up everywhere I looked, and it\u2019s still getting a lot of attention. Fitness influencers evangelize it for muscle recovery, fat loss, and metabolic health. Beauty influencers say it will give you glowing skin and thicker hair. Biohacking bros claim it can help your mood and sleep, and that if you expose your balls to red light, it\u2019ll boost your testosterone.<\/p>\n
Thanks to the social media hype, gyms have started installing red-light booths next to their tanning beds. Just a few months ago, a dedicated red-light studio opened near my neighborhood here in Tulsa. $50 gets you 25 minutes in a red-light booth plus 10 minutes on something called a “power plate.” You can now buy red light therapy panels and blankets for your home, but they\u2019re not cheap; serious at-home red light therapy can set you back $1,000 to $2,000.<\/p>\n
As a creaky, stiff 43-year-old veteran garage powerlifter with nagging tendons, I was intrigued by the promises of pain relief and faster recovery. The potential mood lift was also a plus. Rather than schlep to a tanning studio and fork over $30 a pop for red-light sessions, I decided to buy a red-light blanket \u2014 essentially a sleeping bag lined with therapeutic LEDs \u2014 run an experiment on myself, and then share the results.<\/p>\n
Five times a week for three months starting in January, I stripped down to my birthday suit, crawled into my high-priced red-light burrito wrap, and lay there on our gameroom floor for 15 minutes. About halfway into my session, I’d scrunch my body down so the bag covered my head too, burrowing in like I was in my mummy sleeping bag on a cold night of camping. One morning, my son wandered in to find just my gray head protruding from my glowing red cocoon. Gus finding his dad doing weird things for his man blog isn\u2019t anything new. “You look like a weirdo,” he flatly said and walked out. He wasn’t wrong.<\/p>\n
I\u2019ll let you know below whether my experiment paid off. But first, let\u2019s take a look at how red light therapy works and whether its popularly touted benefits are supported by research-backed evidence.<\/p>\n
Red light therapy, or photobiomodulation (PBM), involves exposing tissue to specific wavelengths of red and near-infrared light to stimulate cellular function, specifically your mitochondria. When cells are stressed, a molecule called nitric oxide plugs a key enzyme in the mitochondrial chain, suppressing ATP production. ATP is the energy currency our cells use for repair and regeneration. Red and near-infrared light can dislodge that nitric oxide and get cellular energy production running again, allowing your body to repair and regenerate. That\u2019s the theory, at least.<\/p>\n
When you\u2019re doing red light therapy, there are two kinds of wavelengths that provide different benefits.<\/p>\n
Visible red light in the 630-660 nm range is primarily absorbed by your skin’s dermis and epidermis.<\/p>\n
Near-infrared light in the 810-850 nm range, on the other hand, passes through skin and can penetrate several centimeters into muscle and joint tissue.<\/p>\n
If you’re treating a skin concern, you want visible red light. If you’re treating a joint or trying to reach deeper tissue, you want near-infrared. Most quality panels deliver both, largely because it makes them more versatile \u2014 you can use the same device for skin, joints, and deeper tissue work \u2014 which is why they\u2019ve become the standard for broader therapeutic use.<\/p>\n
When I dug into the research about red light therapy, I discovered that, like a lot of health fads, the marketing and social media hype around red light therapy has significantly outrun what the science actually supports.<\/p>\n
There are some<\/em> benefits to red light therapy, but they\u2019re a lot narrower than the guys on Reels wearing blue-light-blocking glasses claim.<\/p>\n Wavelengths in the 630-660 nm range penetrate the upper layers of skin and stimulate fibroblasts, the cells responsible for producing collagen and elastin. Meta-analyses have found solid evidence for PBM reducing radiation dermatitis \u2014 skin irritation and damage caused by exposure to radiation therapy \u2014 in cancer patients. There’s also evidence that it accelerates the closure of chronic wounds like diabetic ulcers.<\/p>\n For general anti-aging applications, red light exposure can reduce wrinkles and improve skin texture over time.<\/p>\n But to get the benefits, you have to do red light therapy consistently <\/em>for a long time. We’re talking three to five sessions a week for three to six months before you see any changes. It\u2019s not a quick fix.<\/p>\n If you’re dealing with androgenic alopecia (aka standard male pattern hair loss), the evidence for red light therapy is reasonably solid. Low-level light stimulates the mitochondria in hair follicles and increases blood flow to them. Studies have shown improvements in hair density and thickness in both men and women after three to six months of consistent treatment.<\/p>\n The catch: you have to keep doing red light therapy indefinitely to maintain the hair growth. Stop the sessions, and the follicles drift back to their previous state. So you have to decide whether a modest improvement in your hairline is worth putting on an $800 red-light helmet that looks like something from the Minority Report<\/em> every day, indefinitely.<\/p>\n For specific, targeted musculoskeletal problems \u2014 knee osteoarthritis, plantar fasciitis, localized joint inflammation \u2014 there’s decent evidence supporting red light as an adjunct therapy. Near-infrared wavelengths around 810-850 nm can penetrate several centimeters into muscle and joint tissue and have been shown to suppress pro-inflammatory cytokines and reduce pain. Again, you have to use red light therapy consistently for months before you see any benefit. It\u2019s not a one-and-done thing. Also, it\u2019s an \u201cadjunct\u201d therapy, meaning you need to do it alongside physical therapy to get the benefits.<\/p>\n There are devices you can buy that you can strap to areas that you\u2019re trying to treat. They\u2019re more cost-effective than whole body panels or blankets. Still not cheap though! Look to spend $400-$800 for these.<\/p>\n Multiple meta-analyses \u2014 including reviews published in 2024 and 2025 \u2014 show that red light therapy consistently lowers creatine kinase levels in the blood after intense exercise. Creatine kinase is one of the primary markers for muscle damage, so bringing those levels down faster means your muscles are repairing more quickly. The same research shows consistent reductions in delayed-onset muscle soreness, or DOMS.<\/p>\n The muscle growth question is murkier. Recent meta-analyses suggest PBM doesn’t consistently increase peak strength beyond what training alone produces, and nothing shows that it will do much for hypertrophy.<\/p>\n This is fitness influencers’ favorite claim, and the evidence behind it is the weakest. The theory is that PBM causes temporary pores to form in fat cells, releasing triglycerides to be metabolized. Small studies have documented modest circumference reductions, but these haven’t translated into meaningful changes in total body weight, and without a caloric deficit, the released fat is likely just reabsorbed. No large-scale, long-term human trials support the idea that red light meaningfully accelerates fat loss beyond diet and exercise.<\/p>\n Research into transcranial PBM for conditions like depression and Alzheimer’s looks promising, but it\u2019s still in the early stages. It\u2019s worth watching over the next decade.<\/p>\n But systematic reviews have concluded that sleep quality and cognitive enhancement in healthy individuals using red light aren’t yet statistically significant.<\/p>\nRed Light Therapy May Improve Your Skin<\/h3>\n
Red Light Therapy May Help With Hair Loss<\/h3>\n
Red Light Therapy May Ease Localized Pain and Inflammation<\/h3>\n
Red Light Therapy May Speed Up Muscle Recovery (But Probably Doesn\u2019t Do Much for Muscle Growth)<\/h3>\n
Red Light Therapy Probably Won’t Help You Lose Fat<\/h3>\n
Red Light Therapy Probably Won’t Fix Your Mood or Sleep<\/h3>\n