Find Out How Red Light Therapy Works: The Complete Guide
Introduction: Shedding Light on a Promising Treatment
In recent years, red light therapy has emerged as a popular and intriguing treatment option for a variety of health and beauty concerns. As men and women over 40, we’re constantly seeking effective, non-invasive ways to maintain our well-being and appearance. Red light therapy, also known as photobiomodulation or low-level light therapy, offers a promising solution that’s gaining traction in both medical and aesthetic circles.
This in-depth Red Light Therapy guide will explore the applications, safety issues, and advantages of this technology, giving you the knowledge you need to decide whether or not to incorporate this treatment into your daily routine for health and beauty.
Understanding Red Light Therapy: The Science Behind the Glow
What is Red Light Therapy?
Red light therapy, also known as photobiomodulation, is a non-invasive treatment that uses precise wavelengths of red and near-infrared light to promote healing and wellness. RLT stimulates the mitochondria, the cell’s “powerhouses,” to produce adenosine triphosphate (ATP), the energy currency of cells. Red light therapy increases ATP generation, which boosts cellular energy and aids in healing.
RLT benefits include reduced inflammation, improved blood circulation, faster tissue repair, increased collagen formation, and better overall skin health. Furthermore, studies have indicated that red light treatment can help with pain reduction, muscle discomfort, and joint function. It is a safe and effective treatment for a wide range of illnesses, including skin conditions, arthritis, and athletic injuries.
Red light therapy involves exposing the body to low wavelengths of red light. This light penetrates the skin at different depths, depending on the specific wavelength used. The most common wavelengths in red light therapy range from 630 to 660 nanometers (nm) for surface-level treatments and 810 to 850 nm for deeper penetration. Red light therapy works by stimulating the production of adenosine triphosphate (ATP) in cells, which helps promote healing and reduce inflammation.
This non-invasive treatment is becoming increasingly popular due to its effectiveness and minimal side effects. Many athletes and individuals suffering from chronic pain have turned to red light therapy as a natural and drug-free alternative for managing their conditions. Overall, red light therapy has shown promising results in improving overall health and well-being for a variety of conditions.
How Does It Work?
The science behind red light therapy is based on the principle that certain wavelengths of light can stimulate cellular function. When red light penetrates the skin, it’s absorbed by the mitochondria – the powerhouses of our cells. This absorption is believed to enhance cellular energy production, promote healing, and reduce inflammation. Red light therapy is also thought to increase blood flow and collagen production, which can improve skin health and reduce signs of aging.
Many users of red light therapy report feeling more energized, experiencing less pain, and having improved mood and mental clarity. With its non-invasive nature and minimal side effects, red light therapy is becoming an increasingly popular option for those seeking a holistic approach to managing their health issues.
Additionally, red light therapy has been shown to improve muscle recovery and reduce the appearance of scars and stretch marks. Its ability to penetrate deep into the skin makes it a versatile treatment for a variety of conditions, from acne to arthritis. Overall, red light therapy offers a safe and effective alternative for those looking to improve their overall well-being.
The Spectrum of Red Light Therapy Benefits
Skin Health and Anti-Aging
One of the most popular applications of red light therapy is in the realm of skincare and anti-aging. As we age, our skin’s natural ability to produce collagen and elastin diminishes, leading to fine lines, wrinkles, and loss of firmness. Red light therapy helps to stimulate the production of collagen and elastin in the skin, promoting a more youthful and radiant complexion.
In addition, red light therapy can also improve skin tone and texture, reduce inflammation, and promote healing. With consistent use, red light therapy can help to minimize the appearance of fine lines, wrinkles, and other signs of aging, making it a valuable tool in any anti-aging skincare routine.
Red light therapy has shown promising results in:
- Stimulating collagen production
- Reducing fine lines and wrinkles
- Improving skin tone and texture
- Minimizing the appearance of age spots and sun damage
(For more information on red light and skin benefits see: 1, 2 or 3 or on the appendix for sources of this red light therapy guide.)
Pain Management and Inflammation Reduction
For those of us dealing with chronic pain or inflammatory conditions, red light therapy offers a non-pharmaceutical approach to relief. By targeting the affected areas with red light, this therapy can help reduce pain and inflammation, allowing for improved mobility and comfort. It has been found to be particularly effective in treating conditions such as arthritis, tendonitis, and fibromyalgia.
Additionally, red light therapy can help speed up the healing process for injuries by increasing circulation and reducing inflammation in the affected area. Overall, red light therapy is a versatile and effective treatment option for both skincare and pain management.
Research has shown potential benefits in:
- Alleviating joint pain associated with arthritis
- Reducing muscle soreness and speeding up recovery after exercise
- Decreasing inflammation in various parts of the body
- Managing chronic pain conditions
(For more information on red light and pain management see: 4, 5 or 6 on the appendix for sources of this red light therapy guide.)
Hair Growth and Scalp Health
Thinning hair is a common concern for many women as they age. Red light therapy has shown promise in stimulating hair growth and improving overall scalp health. By increasing blood flow to the hair follicles and promoting the production of new cells, red light therapy can help to rejuvenate the scalp and promote the growth of thicker, healthier hair.
Additionally, the anti-inflammatory properties of red light therapy can also help to reduce scalp irritation and dandruff, further improving the overall health of the scalp. Overall, red light therapy can be a valuable tool in addressing hair loss and promoting scalp health in men and women looking to improve the appearance of their hair.
Red light therapy has shown promising results by:
- Increasing blood flow to the scalp
- Stimulating hair follicles
- Reducing inflammation that may contribute to hair loss
(For more information on red light and hair growth see: 7, 8 or 9 on the appendix for sources of this red light therapy guide.)
Mood and Sleep Improvement
The effects of red light therapy extend beyond physical benefits. Some studies suggest that it may have a positive impact on mood and sleep patterns. Red light therapy has been shown to increase the production of serotonin, a neurotransmitter that plays a key role in regulating mood and promoting feelings of well-being.
Additionally, the therapy has been found to help regulate the body’s circadian rhythm, making it easier to fall asleep and improve overall sleep quality. By improving both mood and sleep, red light therapy can provide a holistic approach to overall health and well-being.
Research has shown potential benefits by:
- Regulating circadian rhythms
- Increasing production of serotonin, the “feel-good” hormone
- Improving overall sleep quality
(For more information on red light and sleep improvement see: 10, 11 or 12 on the appendix for sources of this red light therapy guide.)
Red Light Therapy Applications: From Clinics to Home Use
Professional Treatments
Many spas, dermatology clinics, and wellness centers now offer red light therapy treatments. These professional sessions typically involve lying on a bed or standing in a light therapy booth for a specified duration. The advantage of professional treatments is the use of high-quality, medical-grade devices and expert guidance.
This ensures that the red light therapy is administered safely and effectively. Additionally, professional treatments may offer more powerful and targeted wavelengths of light, leading to potentially faster and more noticeable results. Some individuals may prefer the convenience and expertise of receiving red light therapy in a professional setting, where they can relax and let trained professionals handle the treatment process. However, the cost of professional treatments can add up over time, leading some individuals to explore at-home red light therapy options.
At-Home Devices
The growing popularity of red light therapy has led to the development of various at-home devices. These range from handheld wands to full-body panels. While convenient, it’s important to note that at-home devices may not be as powerful as professional equipment.
Additionally, the effectiveness of at-home devices can vary depending on the quality and intensity of the light emitted. It’s crucial for individuals to do their research and choose a device that is reputable and has been proven to deliver results. Some at-home devices may also require more frequent use or longer treatment times to achieve the same benefits as a professional session. Despite these potential drawbacks, many people find that using at-home red light therapy devices can be a cost-effective and convenient way to incorporate this treatment into their wellness routine.
Options include:
- LED face masks. These masks are designed to target specific areas of the face and deliver red light therapy directly to the skin. They can help improve skin tone, reduce inflammation, and promote collagen production. LED face masks are easy to use and can be incorporated into a skincare routine with minimal effort.
Additionally, they are often more affordable than professional treatments and can be used in the comfort of your own home.
- Handheld devices for targeted treatment. These handheld devices are compact and easy to use, allowing users to target specific areas of concern with precision. They are often equipped with different light settings to cater to different skin needs, such as red light for anti-aging benefits or blue light for acne treatment.
Handheld devices are portable and convenient, making them ideal for on-the-go use or travel. Some devices even come with additional features, such as massaging functions or heat therapy, to enhance the overall treatment experience. Overall, handheld devices offer a versatile and customizable approach to light therapy that can easily fit into any skincare routine.
- Light therapy panels for larger areas of the body. These panels are designed to treat larger areas of the body with the same targeted precision as handheld devices. They are often used for conditions such as psoriasis, eczema, or chronic pain. Light therapy panels come in various sizes and shapes to accommodate different body parts, such as the back, legs, or abdomen. Some panels are even adjustable to allow for optimal positioning and coverage.
Additionally, these panels typically emit a higher intensity of light compared to handheld devices, providing more powerful and effective treatment. With their ability to treat larger areas of the body, light therapy panels offer a convenient and efficient solution for those seeking relief from various skin conditions or pain management.
Safety Considerations: Navigating the Red Light
Is Red Light Therapy Safe?
Red light therapy is generally considered safe when used as directed. Unlike UV light, red light does not damage the skin or increase the risk of skin cancer. In fact, red light therapy has been studied extensively and has shown minimal side effects when used properly. It is important to follow the manufacturer’s instructions for distance and duration of use to avoid any potential risks. As with any form of treatment, it is recommended to consult with a healthcare provider before starting red light therapy, especially for individuals with certain medical conditions or skin sensitivities. Overall, when used responsibly, red light therapy can be a safe and effective option for improving skin health and managing pain.
However, as with any treatment, there are some safety considerations to keep in mind:
- Eye Protection: While red light is not inherently harmful to the eyes, the brightness can be uncomfortable. It’s recommended to use eye protection during treatments, especially when using devices that emit light close to the face. Eye protection is essential to prevent any potential discomfort or damage to the eyes during red light therapy sessions. Additionally, it is important to ensure that the skin is clean and free of any lotions or creams before using red light therapy, as these substances can interfere with the effectiveness of the treatment. It is also advised to start with shorter sessions and gradually increase the duration to avoid any potential skin irritation or sensitivity. By following these safety guidelines, individuals can safely and effectively reap the benefits of red light therapy for their skin health and pain management needs.
- Photosensitivity: Some medications can increase sensitivity to light. If you’re taking any medications, consult with your healthcare provider before starting red light therapy. It is important to be aware of any potential photosensitivity issues that may arise from certain medications before beginning red light therapy. By consulting with a healthcare provider, individuals can ensure that their treatment plan is safe and effective. Taking the necessary precautions and following professional advice will help maximize the benefits of red light therapy for overall skin health and pain management.
- Pregnancy: While there’s no evidence suggesting red light therapy is harmful during pregnancy, it’s always best to consult with your doctor before trying any new treatments while pregnant. It’s important to prioritize safety and consult with a healthcare provider before starting any new treatments, especially during pregnancy. By discussing any concerns or potential risks with a doctor, pregnant individuals can make informed decisions about incorporating red light therapy into their skincare or pain management routine. Ultimately, seeking professional guidance will help ensure the best possible outcomes for both the individual and their baby.
- Skin Conditions: If you have any active skin conditions or recent cosmetic procedures, check with a dermatologist before using red light therapy. It is important to consider how red light therapy may interact with any existing skin conditions or recent cosmetic procedures. Consulting with a dermatologist can help determine if red light therapy is safe and appropriate for your specific situation. Taking the time to prioritize your skin health and safety before starting any new treatments will ultimately lead to better results and overall well-being.
Potential Side Effects
Red light therapy is associated with very few side effects. However, some individuals may experience minor side effects such as temporary redness, irritation, or dryness of the skin. These side effects are typically mild and resolve on their own within a few days. It is important to follow the recommended guidelines for red light therapy usage and to monitor your skin for any unusual reactions. If you experience persistent or severe side effects, it is recommended to discontinue use and consult with a healthcare professional.
Overall, the benefits of red light therapy often outweigh the risks, but it is always important to prioritize your skin health and safety.
Some individuals may experience:
- Temporary redness or warmth in the treated area, which is a normal reaction to the increased blood flow and collagen production stimulated by red light therapy. This should subside quickly and is usually a sign that the treatment is working effectively. It is important to stay hydrated and moisturize your skin after each session to help minimize any potential side effects and keep your skin looking and feeling its best. Remember to always listen to your body and adjust your treatment plan as needed to ensure the best results.
- Mild eye strain if proper eye protection is not used during red light therapy sessions is another potential side effect to be aware of. It is crucial to always wear the appropriate eye protection to prevent any damage to your eyes. If you experience any discomfort or vision changes, be sure to consult with a healthcare provider immediately. Overall, red light therapy can be a safe and effective way to improve your skin’s appearance and overall health when used correctly and with proper precautions in place.
- Headache (rare and usually mild) can also occur as a side effect of red light therapy. It is important to stay hydrated and take breaks during treatment sessions to minimize the risk of developing a headache. If you do experience a headache, over-the-counter pain medication may help alleviate the discomfort. Remember to always follow the recommended guidelines for red light therapy to ensure a positive and beneficial experience.
Maximizing the Benefits: Best Practices for Red Light Therapy
To get the most out of your red light therapy treatments, consider the following tips:
- Consistency is Key: Regular treatments are typically more effective than sporadic use. Follow the recommended treatment schedule for your specific device or professional treatment plan. Consistency is key when it comes to maximizing the benefits of red light therapy. Make sure to follow the recommended treatment schedule for your specific device or professional treatment plan in order to see the best results. By sticking to a regular routine, you can ensure that you are getting the most out of your red light therapy sessions and experiencing the full range of benefits that this treatment has to offer. Remember to always consult with a healthcare professional before starting any new treatment regimen.
- Clean Skin: For skin-related treatments, apply red light therapy to clean, makeup-free skin for better penetration. This will allow the red light to effectively target the deeper layers of the skin and provide optimal results. Additionally, make sure to stay hydrated and maintain a healthy diet to support the healing and rejuvenating effects of red light therapy. By taking these steps and following proper guidelines, you can make the most out of your red light therapy sessions and achieve the desired outcomes for your skin and overall well-being.
- Combine with Skincare: Some studies suggest that using red light therapy in conjunction with certain skincare products may enhance their effectiveness. For example, incorporating a vitamin C serum or hyaluronic acid moisturizer into your skincare routine can help maximize the benefits of red light therapy on your skin. These products can provide additional nourishment and hydration to complement the rejuvenating effects of the red light. Remember to consult with a dermatologist or skincare specialist to determine the best products to use in combination with red light therapy for your specific skin concerns. By combining the power of red light therapy with targeted skincare, you can achieve even greater results and maintain a healthy, glowing complexion.
- Stay Hydrated: Proper hydration supports overall skin health and may enhance the benefits of red light therapy. In addition to using the right products, it is important to stay hydrated to maximize the effects of red light therapy on your skin. Drinking plenty of water helps your skin stay moisturized and plump, allowing the red light therapy to work more effectively. By maintaining proper hydration levels, you can ensure that your skin is in the best condition possible to reap the full benefits of this innovative treatment. So, remember to drink plenty of water and pair it with targeted skincare products to enhance the rejuvenating effects of red light therapy for a radiant complexion.
- Be Patient: Like many natural therapies, red light therapy often requires time to show significant results. Consistency and patience are crucial. It is important to stick to a regular routine and not expect immediate results. Over time, you will begin to notice improvements in your skin’s texture, tone, and overall appearance. By staying committed to your treatment plan and maintaining good hydration, you can achieve the glowing complexion you desire. Remember, good things come to those who wait, so be patient and trust in the process.
The Future of Red Light Therapy: Emerging Research and Applications
As interest in red light therapy grows, so does the body of research exploring its potential applications. New studies are being conducted to investigate the effectiveness of red light therapy in treating a variety of skin conditions, such as acne, eczema, and psoriasis. Additionally, researchers are exploring the use of red light therapy for pain management, wound healing, and even mood disorders.
With continued advancements in technology and a growing understanding of how red light therapy works on a cellular level, the future of this treatment looks promising. As more research is conducted, we can expect to see even more innovative applications of red light therapy in the years to come.
Ongoing studies are investigating its use in:
- Cognitive function and brain health, sports performance enhancement, and even in the treatment of certain types of cancer. The potential benefits of red light therapy are vast and continue to expand as new findings emerge. By harnessing the power of light to stimulate cellular repair and regeneration, this non-invasive treatment offers a safe and effective alternative to traditional medical interventions. As the field of photobiomodulation continues to evolve, the possibilities for red light therapy are endless, making it an exciting area of research and development in the field of healthcare.
- Wound healing and tissue repair, inflammation reduction, and pain relief are just a few of the many applications where red light therapy has shown promise. Studies have also suggested that red light therapy can improve cognitive function, boost mood, and even enhance athletic performance. The versatility of this treatment makes it a valuable tool for both medical professionals and individuals looking to improve their overall health and well-being. With ongoing research and advancements in technology, the potential for red light therapy to revolutionize the way we approach healthcare is truly remarkable.
- Management of side effects from cancer treatments, such as chemotherapy and radiation, is another area where red light therapy has shown potential. By reducing inflammation, promoting tissue repair, and increasing circulation, red light therapy may help alleviate the discomfort and complications associated with these aggressive treatments. Additionally, the ability of red light therapy to stimulate the production of collagen and elastin can aid in the healing of radiation burns and skin damage, providing much-needed relief for cancer patients. As more studies are conducted and the benefits of red light therapy become more widely recognized, its integration into mainstream medical care could have a significant impact on the quality of life for those undergoing cancer treatment.
- Cardiovascular health is another area where red light therapy has shown promising results. Research has indicated that red light therapy can improve blood flow, reduce inflammation, and boost overall heart function. By promoting better circulation and reducing oxidative stress, red light therapy may help prevent cardiovascular issues and support overall heart health. With further research and integration into cardiac care, red light therapy could potentially revolutionize the way we approach cardiovascular disease prevention and treatment.
While these areas show promise, it’s important to approach new claims with a critical eye and consult with healthcare professionals before using red light therapy for specific medical conditions. Red light therapy is still a relatively new field, and more studies are needed to fully understand its impact on cardiovascular health. It’s crucial to consult with healthcare professionals before incorporating red light therapy into your treatment plan, especially if you have pre-existing heart conditions.
However, the potential benefits of red light therapy in promoting heart health are promising, and it may become an important tool in the future of cardiac care.
Conclusion: Embracing the Glow of Red Light Therapy
Red light therapy is an intriguing, non-invasive approach to a variety of health and cosmetic concerns that are relevant to everyone, but notably men and women over the age of 40. From its ability to minimize the effects of aging to its applications in pain management and overall wellness, this innovative treatment has piqued the interest of both the medical community and beauty fans.
As research continues to uncover the potential benefits of red light therapy, it is clear that this treatment has the potential to revolutionize the way we approach health and wellness. With its ability to improve circulation, reduce inflammation, and promote cell regeneration, red light therapy offers a holistic approach to addressing a wide range of health issues. Whether used as a standalone treatment or in conjunction with other therapies, red light therapy has the potential to significantly improve the quality of life for individuals of all ages. As we continue to embrace the glow of red light therapy, it is important to stay informed about the latest research and developments in this exciting field.
As with any treatment, it is critical to approach red light therapy with realistic expectations and a dedication to safety. Understanding the science underlying the therapy, its possible advantages, and correct usage requirements allows you to make informed decisions about including red light therapy into your health and beauty routine.
By staying informed and educated about red light therapy, individuals can maximize the benefits they receive from this treatment. It is important to consult with a healthcare professional or trained therapist before beginning any new therapy regimen to ensure it is safe and appropriate for your individual needs. Additionally, keeping up to date with the latest research and advancements in red light therapy can help individuals make informed decisions about their health and wellness journey. With the right knowledge and guidance, red light therapy can be a valuable tool in enhancing overall well-being and quality of life.
Remember that, while red light treatment has numerous benefits, it is not a cure-all. It works best when combined with a healthy diet, moderate exercise, appropriate skincare, and attention to general lifestyle variables.
It is important to consult with a healthcare professional before starting any new treatment regimen, including red light therapy, to ensure it is safe and appropriate for your individual needs. Additionally, keeping up to date with the latest research and advancements in red light therapy can help individuals make informed decisions about their health and wellness journey.
With the right knowledge and guidance, red light therapy can be a valuable tool in enhancing overall well-being and quality of life. Remember that, while red light treatment has numerous benefits, it is not a cure-all. It works best when combined with a healthy diet, moderate exercise, appropriate skincare, and attention to general lifestyle variables. It is important to approach red light therapy as part of a holistic approach to health and wellness rather than relying on it as a standalone solution. By incorporating red light therapy into a comprehensive wellness plan, individuals can maximize the benefits and achieve optimal results.
As research progresses, we should expect to learn more about the full potential of red light treatment. Meanwhile, for individuals looking for a natural, non-invasive way to achieve their health and beauty goals, red light therapy is a fascinating and potentially useful option to consider. As with any wellness practice, consistency and patience are key when incorporating red light therapy into a routine.
It is recommended to consult with a healthcare professional or experienced practitioner to develop a personalized plan that aligns with individual health goals. By combining red light therapy with other healthy habits such as regular exercise, a balanced diet, and stress management techniques, individuals can further enhance the benefits and overall effectiveness of this innovative treatment. Embracing a holistic approach to health and wellness can lead to long-lasting results and a greater sense of well-being.
Remember always that Red Light Insider is your guide in this journey, and we are here to make sure it is a safe, transformative, and exciting one.
Sources:
- Asheesh, Gupta, et al. Low-level Laser (Light) Therapy (LLLT) in Skin: Stimulating, Healing, Restoring. NIH Public Access, www.ncbi.nlm.nih.gov/pmc/articles/PMC4126803.
- Glauce, Regina, et al. Photobiomodulation Therapy Reduces Acute Pain and Inflammation in Mice. Journal of Photochemistry and Photobiology B Biology 196, 2019, www.sciencedirect.com/science/article/pii/S1011134419303227.
- Jared, Jagdeo. “The combination of resveratrol and high-fluence light emitting diode-red light produces synergistic photobotanical inhibition of fibroblast proliferation and collagen synthesis: a novel treatment for skin fibrosis. … and High-fluence Light Emitting Diode-red Light Produces Synergistic Photobotanical Inhibition of Fibroblast Proliferation and Collagen Synthesis: A Novel Treatment For …. 1, 2017, journals.lww.com/dermatologicsurgery/fulltext/2017/01000/The_Combination_of_Resveratrol_and_High_Fluence.12.aspx.
- Karsten, Matuschka. “A controlled trial to determine the efficacy of red and near-infrared light treatment in patient satisfaction, et al. … Trial to Determine the Efficacy of Red and Near-infrared Light Treatment in Patient Satisfaction, Reduction of Fine Lines, Wrinkles, Skin Roughness, and Intradermal Collagen …. 2, 2014, www.liebertpub.com/doi/abs/10.1089/pho.2013.3616.
- Michael, R., and N. Demidova Tatiana. Mechanisms of Low Level Light Therapy. Mechanisms for lowlight therapy, 2006, www.spiedigitallibrary.org/conference-proceedings-of-spie/6140/1/Mechanisms-of-low-level-light-therapy/10.1117/12.646294.short.
- Raymond, J., et al. The Growth of Human Scalp Hair in Females Using Visible Red Light Laser and LED Sources. 8, 2014, onlinelibrary.wiley.com/doi/abs/10.1002/lsm.22277.
- Rodrigues, de Morais, et al. Anti-inflammatory Effect of Low-level Laser and Light-emitting Diode in Zymosan-induced Arthritis. 2, 2010, www.liebertpub.com/doi/abs/10.1089/pho.2008.2422.
- Shigeki, Inui, et al. Narrow-band Red LED Light Promotes Mouse Hair Growth Through Paracrine Growth Factors From Dermal Papilla. 3, 2011, www.jdsjournal.com/article/S0923-1811(11)00279-9/abstract.
- Yulong, Tang, et al. Hair Growth Promoting Effects of 650 Nm Red Light Stimulation on Human Hair Follicles and Study of Its Mechanisms via RNA Sequencing Transcriptome Analysis. 6, 2021, www.ncbi.nlm.nih.gov/pmc/articles/PMC8577899.
- Corrado, Garbazza, et al. Effects of Light on Human Circadian Rhythms, Sleep and Mood. 3, 2019, www.ncbi.nlm.nih.gov/pmc/articles/PMC6751071.
- Cremascoli, Riccardo Davide Sparasci Gianluca Giusti Stefania Cattaldo Elisa Prina Fausto Roveta Francesco Bruno et al. Effects of Circadian Phase Tailored Light Therapy on Sleep, Mood, and Cognition in Alzheimer’s Disease: Preliminary Findings in a Pivotal Study. Frontiers in physiology 12, 2022, www.frontiersin.org/articles/10.3389/fphys.2021.755322/full.
- Guimei, Zhang, et al. Effects of Red Light on Sleep and Mood in Healthy Subjects and Individuals With Insomnia Disorder. Frontiers in Psychiatry 14, 2023, www.frontiersin.org/articles/10.3389/fpsyt.2023.1200350/full.