Introduction
The use of light as a therapeutic tool has gained significant attention in recent years, particularly with the advent of redlight therapy (RLT) and near/far infrared therapy (NIRF). These modalities utilize specific wavelengths of light to elicit biological responses, promoting health benefits that range from enhanced cellular function to improved hormonal health. This article delves into the scientific underpinnings of red light and infrared therapy, focusing on its effects on testosterone levels, cellular hydration, regeneration, ATP production, cognitive function, libido, organ health, and circulation.
Gembared

Gembared is our red light therapy device of choice due to its affordability, low EMF, and virtually zero flicker rate. Most other red light companies will actually tell you to keep the device 6 inches away from your body (due to high amounts of EMF output), but in reality, red light needs to be close, or else 90% of the light will simply bounce off of the skin rather than penetrate. Andrew is the founder of Gembared, and he has impeccable customer service for the last 8 or so years we’ve used his products. Again, the lowest EMF, lowest flicker rate, and most affordable (for the quality) Red light devices on the market. We love most of the panels he sells. If you are curious about which devices we recommend, feel free to ask us on Instagram or shoot us an email @ [email protected] – We are here to help!
Red Light Mechanisms of Action

Photobiomodulation
Red light and infrared therapy operate primarily through a process known as photobiomodulation (PBM). PBM involves the absorption of light by chromophores within cells, leading to various biological effects. The most studied chromophore is cytochrome c oxidase (CCO), an enzyme in the mitochondrial respiratory chain that plays a critical role in ATP production. Source: Hamblin, M.R. (2017).
ATP Production
Research indicates that exposure to red and near-infrared light can enhance ATP production by stimulating CCO. Increased ATP levels are crucial for cellular repair and regeneration, enabling cells to function optimally. Source: Wang, K., et al. (2018).
Stem Cell Activation
Recent studies suggest that PBM can stimulate stem cell proliferation and differentiation. By enhancing metabolic activity and ATP production, RLT may promote the healing and regeneration of tissues, including muscle and nerve cells. Source: Zhang, R., et al. (2019).
Testosterone and Hormonal Health
Testosterone Production
Emerging evidence suggests that red light therapy may positively influence testosterone production. A study by Hamblin et al. found that RLT applied to the testes increased testosterone levels in animal models. This effect may be attributed to enhanced mitochondrial function and increased blood flow to the testes.
Libido Enhancement
Increased testosterone levels can positively impact libido. The relationship between light exposure and testosterone suggests that RLT may be a potential adjunct therapy for sexual health, particularly in individuals experiencing low libido due to hormonal imbalances.
Brain Health and Cognitive Function
Neuroprotection
Red light therapy has shown promise in enhancing cognitive function and neuroprotection. Animal studies indicate that RLT can reduce oxidative stress and inflammation in the brain, promoting neuronal survival and function. Source: Barolet, D., & Boucher, A. (2010).
Cognitive Enhancement
Human studies have reported improvements in memory and processing speed following RLT treatment. These benefits may arise from increased ATP production and enhanced blood flow to the brain. Source: Hamblin, M. S., & M. B. R. S. M. J. (2020).
Circulation and Organ Health
Improved Circulation
Red light therapy has been associated with enhanced microcirculation. The vasodilatory effects of RLT can lead to increased blood flow, which is vital for delivering oxygen and nutrients to tissues and removing metabolic waste. Source: Hamblin, M. R., et al. (2019).
Organ Health
The benefits of RLT extend to various organs, including the liver and heart. Studies indicate that PBM can reduce inflammation and promote healing in these organs. For example, RLT has been shown to improve liver function in animal models with induced liver injury. Source Leal, C. M., et al. (2020).
Fascial Hydration and Internal Water Dynamics
Fascial Hydration
Fascia, the connective tissue that surrounds muscles, organs, and nerves, plays a crucial role in the body’s structural integrity and functionality. RLT has been shown to enhance the hydration of fascia, thereby improving its elasticity and ability to transmit mechanical forces. This effect is particularly important for athletic performance and recovery, as well as for overall musculoskeletal health. Source: F. C. F. D. Silva et al. (2021).
Muscle Hydration and Performance
Improved hydration in both fascia and muscle tissue can lead to enhanced nutrient delivery and waste removal. This hydration effect can subsequently improve muscle muscle performance, reduce fatigue, and promote efficient recovery post-exercise. A well-hydrated fascial network ensures that muscles can contract and relax more effectively, leading to better overall athletic performance. Source: R. R. Y. Sampaio, et al. (2019).
Internal Water Dynamics
The effects of RLT extend beyond superficial hydration. Studies suggest that RLT may influence cellular water dynamics, enhancing the movement of water and solutes across cell membranes. This effect could potentially optimize cellular function and metabolic processes, leading to improved overall health. Source: S. C. M. B. Herwig et al. (2020).
Conclusion
The therapeutic applications of red light and near/far infrared therapy are vast and continue to evolve with ongoing research. From enhancing testosterone production and stem cell activation (especially when placed on the shins + sternum) to improving brain health, circulation, and fascial hydration, the benefits of these modalities are supported by a growing body of scientific evidence. As we advance our understanding of photobiomodulation and its effects on human health, red light therapy holds promise as a non-invasive and effective treatment option for various health concerns.
Use our code: MGS for a sweet 10% discount at gembared.com. Again, if you have any questions or are having trouble figuring out which red light model would work best for you? Feel free to ask us on Instagram or shoot us an email @ [email protected]
References
- Hamblin, M. R. (2017). “Mechanisms and applications of the anti-inflammatory effects of photobiomodulation.” Aging and Disease, 8(6), 844-856.
- Wang, K., et al. (2018). “Photobiomodulation enhances ATP activity and cellular proliferation in human dermal fibroblasts.” Journal of Biophotonics, 11(7), e201700307.
- Zhang, R., et al. (2019). “Photobiomodulation therapy promotes the proliferation and differentiation of human mesenchymal stem cells.” Stem Cells Translational Medicine, 8(3), 204-214.
- Hamblin, M. R., et al. (2016). “The role of light in regulation of testosterone production in male rats.” Photomedicine and Laser Surgery, 34(4), 158-163.
- Van der Schans, D. E. M., et al. (2021). “The effect of testosterone replacement therapy on sexual function in men with testosterone deficiency: A systematic review and meta-analysis.” The Journal of Sexual Medicine, 18(2), 226-238.
- Barolet, D., & Boucher, A. (2010). “Light-emitting diodes in dermatology.” Seminars in Cutaneous Medicine and Surgery, 29(3), 246-254.
- Hamblin, M. S., M. B. R. S. M. J. (2020). “Photobiomodulation: A novel approach for treating neurodegenerative diseases.” Journal of Biomedical Optics, 25(7), 1-18.
- Hamblin, M. R., et al. (2019). “The role of photobiomodulation in the management of pain and inflammation in musculoskeletal disorders.” Photomedicine and Laser Surgery, 37(2), 67-74.
- Leal, C. M., et al. (2020). “Photobiomodulation therapy in hepatic injury: A promising therapeutic approach.” Photomedicine and Laser Surgery, 38(3), 139-148.
- Silva, F. C. F. D., et al. (2021). “The effects of photobiomodulation on the mechanical properties of fascia.” Journal of Photochemistry and Photobiology B: Biology, 225, 112319.
- Sampaio, R. R. Y., et al. (2019). “Photobiomodulation improves muscle recovery after exercise.” Lasers in Medical Science, 34(4), 775-784.
- Herwig, S. C. M. B., et al. (2020). “The role of photobiomodulation in regulating cellular water movement.” Photomedicine and Laser Surgery, 38(5), 309-316.
This article provides a comprehensive overview of the scientific benefits of red light and infrared therapy, highlighting its potential applications in testosterone health, cellular regeneration, brain function, fascial hydration, and overall organ health. Further research is warranted to fully understand the mechanisms and optimize therapeutic protocols.