Red Light Therapy: Uses, Benefits & What the Research Says

Have you scrolled through wellness content lately and come across someone sitting in front of a glowing red panel or holding a small red light therapy wand up to their face? Beyond the devices' visual appeal, the science goes back further than you might think. In the 1990s, NASA-supported researchers investigated red and near-infrared light for wound healing and cell growth. A cited laboratory study found increased proliferation in cultured skeletal muscle cells, fibroblasts, osteoblasts, and epithelial cells [1]. This work helped lay the groundwork for later photobiomodulation research. Today, photobiomodulation devices are used in clinical practice and wellness settings.

So what is red light therapy actually used for, and is it worth adding to your routine? Let's break it down.

What's The Science Behind The Application of Red Light Therapy?

Unlike UV radiation, red and near-infrared light do not work by damaging skin cells. Red and near-infrared wavelengths are thought to modulate mitochondrial cytochrome-c oxidase, increasing ATP production and influencing oxidative stress and inflammatory pathways [2]. These cellular effects may also influence signaling related to repair and circulation, which is why red light therapy is being studied across a range of health and beauty applications. 

What are the Main Uses of Red Light Therapy?

1. Skin Health and Anti-Aging

This is one of the most researched uses of RLT. Studies of red light therapy for face and for skin suggest it may encourage collagen production, which could contribute to firmer-looking skin, fewer fine lines and wrinkles, and a more even skin tone. A randomized, placebo-controlled clinical trial found that LED phototherapy using 830 nm and 633 nm wavelengths may reduce wrinkles and increase skin elasticity [3]. Improvements are typically modest and gradual, and study protocols vary in dose, frequency, and device type.

2. Acne and Inflammatory Skin Conditions

People dealing with mild eczema, rosacea, or general skin irritation may consider a red light therapy device because it is gentle on the skin and does not involve harsh chemicals or exfoliants. When red light is paired with blue light, the blue wavelength can target acne-associated bacteria while red light may help calm visible redness and support the skin's healing response. A 2025 systematic review and meta-analysis involving 216 participants found that at-home red or blue light devices may reduce acne compared with control treatments [4]. Evidence is strongest for mild to moderate acne, and data for eczema and rosacea remain preliminary and should be interpreted cautiously.

3. RLT for Pain Relief and Joint Comfort

Another widely researched application of RLT is pain relief, particularly for people with joint discomfort and arthritis. Research on conditions such as tendinopathy [5], knee osteoarthritis, and carpal tunnel syndrome suggests that red and near-infrared light may help reduce pain and improve function, potentially by influencing local circulation and inflammatory pathways around joints and soft tissue. Photobiomodulation should be considered an adjunct therapy; effects are typically short-term and protocol-dependent.

4. Muscle Recovery for Athletes

RLT has become part of some athletes' and fitness enthusiasts' recovery routines because of its potential to support recovery and performance. RLT used around exercise may reduce delayed-onset muscle soreness and markers of muscle damage. In one study, athletes received 810 nm photobiomodulation before exercise, with improvements reported in post-exercise performance and recovery markers. [6] However, the optimal dosing and timing remain under investigation.

5. Wound Healing

Building on earlier NASA-supported research [1], some studies suggest that red light therapy may support cellular repair during minor wound healing and scar reduction. Most wound-healing studies are small or condition-specific, however, so their results may not generalize to all wound types.

6. Sleep and Relaxation

RLT is sometimes incorporated into evening routines. In a small study of 20 female basketball players, 30 minutes of RLT for 14 nights was associated with improved sleep quality and increased serum melatonin production [7]. However, evidence for sleep improvement remains limited, and larger studies are needed. 

What to Look for in a Red Light Therapy Device?

Before choosing a red light therapy device for its usage, a few things matter:

· Wavelength: look for devices that combine red (around 630–660nm) and near-infrared (around 810–850nm) light, since each penetrates the skin to a different depth.

· Irradiance: This is known as the strength of the light at your skin. Weak, underpowered devices may not produce meaningful results even if the wavelength is correct.

· Treatment area: small devices are great for targeted spots like the face or a cold sore, while a panel or wearable is better suited for larger areas like the back or legs.

· Session time: most protocols are short, consistent sessions (often 10–15 minutes) rather than infrequent ones.

Is Red Light Therapy Safe?

Generally, red light therapy has shown a favorable safety profile across studies of different targeted uses. The most common immediate effect is mild warmth at the treatment site, and red light does not carry the same UV-related skin damage risk. People taking photosensitizing medications or living with certain skin conditions should consult a healthcare professional first, and eye protection is recommended with higher-powered panels. Avoid use in cases of active malignancy, pregnancy, or photosensitive conditions unless advised by a clinician.

If you're exploring your options to choose the right device, LifeZoom's lineup of red and near-infrared devices from the compact handheld wand to the flexible Veyra panel series is built around this same principle of consistent, targeted light exposure, with adjustable settings so you can tailor sessions to your skin, joints, or muscles.

Not A Miracle Cure!

Red light therapy is not an overnight miracle, but growing research points to potential benefits for skin health, pain relief, muscle recovery, and other applications. As with many wellness practices, it is generally approached as a consistent routine rather than a one-time fix, and device wavelength, irradiance, dose, and protocol can affect outcomes. Some cited studies use low-level laser therapy (LLLT). Although LLLT and LED red light therapy both fall under photobiomodulation and share similar mechanisms, LEDs often deliver lower irradiance, so results may differ depending on device strength and protocol.

References:

1. Whelan HT, Smits RL, Buchman EV, Whelan NT, Turner SG, Margolis DA, et al. Effect of NASA light-emitting diode irradiation on wound healing. J Clin Laser Med Surg. 2001 Dec;19(6):305–14. doi:10.1089/104454701753342758 PubMed PMID: 11776448.

2. Hamblin MR. Mechanisms and Mitochondrial Redox Signaling in Photobiomodulation. Photochem Photobiol. 2018 Mar;94(2):199–212. doi:10.1111/php.12864 PubMed PMID: 29164625; PubMed Central PMCID: PMC5844808.

3. Lee SY, Park KH, Choi JW, Kwon JK, Lee DR, Shin MS, et al. A prospective, randomized, placebo-controlled, double-blinded, and split-face clinical study on LED phototherapy for skin rejuvenation: clinical, profilometric, histologic, ultrastructural, and biochemical Aevaluations and comparison of three different treatment settings. J Photochem Photobiol B. 2007 Jul 27;88(1):51–67. doi:10.1016/j.jphotobiol.2007.04.008 PubMed PMID: 17566756.

4. Ershadi S, Barbieri JS. At-Home LED Devices for the Treatment of Acne Vulgaris: A Systematic Review and Meta-Analysis. JAMA Dermatol. 2025 May 1;161(5):552–5. doi:10.1001/jamadermatol.2025.0019 PubMed PMID: 40042878; PubMed Central PMCID: PMC11883593.

5. Yap BWD, Lim ECW. Shedding more light on the short-term effect of low-level laser therapy on pain in tendinopathy: A systematic review with meta-analysis. J Back Musculoskelet Rehabil. 2025 Nov;38(6):1232–56. doi:10.1177/10538127251339104 PubMed PMID: 40437920.

6. Aver Vanin A, De Marchi T, Tomazoni SS, Tairova O, Leão Casalechi H, de Tarso Camillo de Carvalho P, et al. Pre-Exercise Infrared Low-Level Laser Therapy (810 nm) in Skeletal Muscle Performance and Postexercise Recovery in Humans, What Is the Optimal Dose? A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Photomed Laser Surg. 2016 Oct;34(10):473–82. doi:10.1089/pho.2015.3992 PubMed PMID: 27575834.

7. Zhao J, Tian Y, Nie J, Xu J, Liu D. Red light and the sleep quality and endurance performance of Chinese female basketball players. J Athl Train. 2012;47(6):673–8. doi:10.4085/1062-6050-47.6.08 PubMed PMID: 23182016; PubMed Central PMCID: PMC3499892.