Research in Red Light Therapy
Below we have compiled some of the most significant studies in red light therapy that may be valuable to know for those interested in purchasing red light products.
Introduction to Red Light Therapy (PBM)
Red light therapy, or Photobiomodulation (PBM), is a therapy where specific wavelengths of red and infrared light are used to stimulate healing, reduce inflammation and improve cellular functions. PBM works by affecting the mitochondria in the body's cells, which increases the production of ATP (energy) and accelerates cell regeneration. The treatment has been used in several different areas, including pain relief, skin improvement, wound healing, and mental well-being.
Categorization of the Studies
Pain relief
McColloch et al. (2021), United States
- Study : In vitro study on stem cell-derived adipocytes to investigate the effects of red light on hypertrophy.
- Method : Stem cells were stimulated with red light with a wavelength of 660 nm. Exposure lasted 10 minutes per session, three times a week for four weeks.
- Results : The red light treatment led to a reduction in adipocyte hypertrophy and improved cellular metabolism, suggesting a potential for pain relief related to adipose tissue inflammation.
- Link to study
Yoshimura et al. (2016), Brazil
- Study : In vivo study on mice to investigate how red light affects inflammation in adipose tissue.
- Method : Mice were exposed to red light with a wavelength of 830 nm for 5 minutes per day for 10 days. The study measured inflammatory markers in the tissue before and after treatment.
- Results : Marked reduction of inflammatory cytokines was observed, showing that PBM has anti-inflammatory properties that can reduce muscle pain and joint inflammation.
- Link to study
Wound healing
Sert et al. (2021), Turkey
- Study : In vivo study in rats to assess the effect of red light on wound healing.
- Method : Rats with induced wounds were treated with polychromatic light (600–1200 nm) for 15 minutes daily for one week.
- Results : Treated rats showed faster wound healing compared to the control group, with clearly increased collagen production and reduced inflammation in the treated areas.
- Link to study
Gong et al. (2019), China
- Study : Rat model study to investigate the effects of PBM on free fatty acids and the wound healing process.
- Method : Rats were exposed to red light (850 nm) for 10 minutes per day for two weeks. Adipose tissue was analyzed for changes in free fatty acid levels and the rate of wound healing was evaluated.
- Results : Reduction of free fatty acids and a faster wound healing process compared to untreated rats.
- Link to study
Skin improvement (Anti-aging)
Mafra et al. (2019), Brazil
- Study : Rat study on the effect of PBM on skin gene expression related to aging.
- Method : Rats were exposed to 904 nm red light for 20 minutes daily for three weeks. Gene expression in the skin was analyzed for markers linked to aging.
- Results : Treated rats showed reduced expression of genes associated with oxidative stress and aging, indicating that PBM can reduce signs of aging in the skin.
- Link to study
Muscle pain and recovery
Yoshimura et al. (2016), Brazil
- Study : A study in mice to investigate the effects of red light treatment on muscles after intense exercise.
- Method : Mice were treated with 850 nm red light for 10 minutes after an exercise session and muscle tissue was analyzed for inflammatory markers and recovery.
- Results : Significant reduction of inflammatory markers in the muscle tissue and faster muscle recovery compared to the control group.
- Link to study
Mental well-being
Although research into how PBM affects mental health is still ongoing, some preliminary studies show that red light treatments can have a positive effect on brain function and reduce symptoms of stress and anxiety. This is being investigated in ongoing clinical trials, and results will be updated as available data are published.
How to Use Red Light for Optimal Effect
- Placement and distance : Keep the lamp at a distance of 10-15 cm from the skin for maximum penetration of the light.
- Treatment time : Use the light for 10-20 minutes per day for each treatment area.
- Frequency : For long-lasting results, it is recommended that you use the PBM treatment at least 3-5 times per week.
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