Red light therapy (RLT), also known as photobiomodulation, low-level laser therapy (LLLT), or low-power laser therapy (LPLT), is a unique method to address certain medical conditions. It can be used as an alternative or in conjunction with medications. This therapy is easily accessible, generally safe, and may be covered by some insurance plans. Red light therapy belts offer a convenient and effective way to bring the power of red and near-infrared light therapy directly to the areas that need it most, such as the lower back, abdomen, hips, knees, or even shoulders.
What is Red Light Therapy?
Red light therapy (RLT) involves exposing the body to low-wavelength red light. It uses specific wavelengths of red (typically 630-660 nm) and near-infrared (around 850-880 nm) light. The light is placed on a targeted area of skin, usually at a light wavelength between 630-700 nanometers. This process stimulates the production of mitochondria, the main energy source in cells, to help promote cell growth and function.
Other Names for Red Light Therapy
Scientific literature suggests there are many other names for RLT, such as:
- Low-level light therapy (LLLT)
- Soft laser therapy
- Cold laser therapy
- Biostimulation
- Photonic stimulation
- Low-power laser therapy (LPLT)
How Red Light Therapy Works
Red light therapy is thought to work by acting on the "power plant" in your body’s cells called mitochondria. RLT works by repetitively exposing your skin to low levels of red and near-infrared light for a certain period.
At low wavelengths, red light doesn’t generate heat and penetrates the skin between 1 and 2 millimeters. This red light exposure may produce a positive biochemical effect in your cells that strengthens the mitochondria, where the cell’s energy is created. RLT may do this by increasing the transportation of electrons, oxygen consumption, and levels of ATP (adenosine triphosphate). With more energy, other cells can do their work more efficiently, doing things like repairing skin, boosting new cell growth, and enhancing skin rejuvenation. More specifically, certain cells absorb light wavelengths and are stimulated to work.
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LEDs are gaining popularity over lasers as the chosen RLT light source because they’re nonablative, meaning they help smooth skin without harming the outer layer. LEDs are also nonthermal, meaning they don’t produce heat or burn the skin. Red light therapy uses very low levels of heat and doesn’t hurt or burn the skin. Unlike the light used in tanning booths, it doesn’t expose your skin to damaging UV rays.
Red light therapy may work in skin health to:
- Stimulate collagen production, which gives skin its structure, strength, and elasticity.
- Increase fibroblast production, which makes collagen. Collagen is a component of connective tissue that builds skin.
- Increase blood circulation to the tissue.
- Reduce inflammation in cells.
What Conditions Can Benefit from Red Light Therapy?
Red light therapy can be used for a variety of conditions, often in combination with medications. Some of the most common conditions include skin conditions and pain management. By delivering therapeutic wavelengths deep into the body, red light therapy belts support pain relief, faster healing, improved circulation, and even enhanced skin health.
Skin Conditions
Red light therapy is used for several different types of skin conditions. It is thought to help increase the production of collagen, which helps give skin its structure and elasticity, promote skin healing from increased blood flow, and reduce redness and irritation on the skin.
Conditions that utilize red light therapy include:
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- Psoriasis
- Acne
- Wrinkles
- Eczema
- Hair loss
- Minor wounds
- Mouth sores caused by certain chemotherapy medications
- Scars
- Stretch marks
- Sun-damaged skin
Pain Management
Red light therapy can also be used to help treat pain in combination with medications. Since it increases cell production by stimulating the mitochondria, it can help promote healing and reduce inflammation. It can also help release neurotransmitters such as endorphins, which are natural pain killers.
Some pain conditions that utilize red light therapy include:
- Muscle pain
- Pain associated with chemotherapy medications
- Joint pain
- Ankle tendonitis
- Rheumatoid arthritis
- Carpal tunnel syndrome
- Osteoarthritis of the knee
- Fibromyalgia
- Non-specific low back pain
- Surgery
Other Conditions
Red light therapy is also used for other conditions, such as weight loss and dementia.
Research shows red light therapy may smooth your skin and help with wrinkles. Researchers think it does this by stimulating collagen production, which helps improve skin elasticity. Research shows it also helps improve signs of sun damage.
A 2021 research review found that in all 10 studies included in the review, red light therapy had benefits for people with dementia. In one of the studies, five people with dementia who had regular light therapy on their heads and through their noses for 12 weeks had better memories, slept better, and were angry less often.
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Red Light Therapy Belts: A Closer Look
Red light therapy belts are a convenient and effective way to bring the power of red and near-infrared light therapy directly to the areas that need it most, such as the lower back, abdomen, hips, knees, or even shoulders. Unlike panels or handheld devices, belts offer flexibility and hands-free use for targeted therapy on specific areas of the body.
Why Use a Red Light Therapy Belt?
- Lower back pain: Great for sciatica, lumbar stiffness, or herniated discs.
- Abdominal inflammation: Helps with bloating, gut support, or post-workout recovery.
- Joint pain: Wrap around knees, elbows, or hips for localized relief.
- Post-surgery recovery: Supports healing in targeted zones.
How Does a Red Light Therapy Belt Work?
- Wrap the belt around the treatment area (most belts are adjustable and fit most body types).
- Turn it on-typically runs for 10-30 minutes per session.
- The light penetrates tissue and stimulates cellular regeneration.
- Use consistently (3-5x/week) for best long-term results.
Benefits of Red Light Therapy Belts
- Drug-Free Pain Relief: Alleviate chronic or acute pain without medication.
- Reduce Inflammation: Helpful for joint swelling or muscle strain.
- Improved Recovery: Athletes use it to accelerate muscle repair.
- Skin Rejuvenation: Stimulates collagen and improves tone/texture.
- Portable & Easy to Use: Great for at-home therapy or on-the-go relief.
Is Red Light Therapy Safe?
Red light therapy appears to be safe and isn’t associated with any side effects, at least if used short-term and as directed. This therapy isn’t toxic, not invasive, and not as harsh as some topical skin treatments. Unlike the cancer-causing ultraviolet (UV) light from the sun or tanning booths, RLT doesn’t use this type of light.
However, high levels of red light can cause redness, swelling, and blistering on the skin. Red light can also damage your eyes, so it is important to wear protective goggles when using red light therapy. There have been reports of burns, lesions, and blistering from using RLT units. Some people developed burns after using the device for 30 minutes, after falling asleep with the unit in place, or due to broken wires or device corrosion.
Who Should Exercise Caution?
- Individuals with darker skin tones: People who have darker skin tones are more sensitive to visible light, such as red light, than people with lighter skin tones, and this sensitivity may lead to side effects like long-lasting hyperpigmentation.
- People taking medication that increases their sensitivity to light: People taking medication that increases their sensitivity to light may need to avoid red light therapy, and people with medical conditions that make them photosensitive - more sensitive to sunlight.
- People with a history of skin or eye cancers: If you have a history of skin or eye cancers, it is important to consult your oncologist or primary care physician before using red light therapy.
- Pregnant people: There is not a lot of research on the effects of red light therapy on pregnant people, but limited research suggests that it is safe.
Where Can You Get Red Light Therapy Treatments?
You can get red light therapy at your doctor’s office, most commonly at your dermatologist, although other doctors may offer these services. Red light therapy is also available at other unique locations, such as spas, estheticians, and even yoga studios.
You can also buy devices to use at home. If you do choose to purchase a red light therapy device, make sure to shield your eyes for protection, follow all directions, and take good care of the device. It is important to check with your doctor or dermatologist prior to using red light therapy at home to make sure it is safe for you. Home devices are often not as strong or effective as devices that are used in doctors’ offices. If you plan to use red light therapy at home, it is important to check and make sure that the device has been reviewed and approved by the FDA.
Types of Red Light Therapy Devices
There are several types of red light therapy devices, including:
- Masks that fit over your entire face.
- Beds, similar to tanning beds.
- Panels of light that can be mounted on a wall or a table.
- Handheld therapy wand.
- Caps or helmets to place on the head.
Choosing the Right Red Light Therapy Belt
Look for belts that offer:
- Dual wavelengths (red + near-infrared)
- Flexible, adjustable fit for various body areas
- Medical-grade LED output with safety certifications
- Auto shut-off timers and rechargeable battery options
How Often Should You Use Red Light Therapy?
The duration and frequency of red light therapy sessions vary depending on the condition being treated but generally require several sessions over weeks or months. You’ll likely need ongoing treatments. This isn’t a one-time treatment for most skin conditions. You’ll need to be seen one to three times a week for weeks or even months. Also, is there a need for additional touch-up treatments?
Red Light Therapy Cost
Unfortunately, red light therapy is not usually covered under insurance. Red light therapy is also not typically covered by insurance, and so you may have to pay for it out of pocket. The cost of sessions varies between $25 - $200 per session depending on the area being treated. The cost of this therapy can vary greatly depending on whether you are using a device at home or you are getting treatment in a clinic. But in general, red light therapy isn’t cheap - treatments can cost $80 a session or more.
Potential Side Effects of Red Light Therapy
Red light therapy is generally considered safe, non-invasive, and well-tolerated. Some users may experience temporary warmth or mild redness in the treated area. Always follow the product’s guidelines and consult your healthcare provider if you have underlying health conditions.
However, if products are misused - perhaps used too often or not according to directions - there’s a chance your skin or eyes (if not protected) could be damaged. The long-term safety of devices that use red light therapy isn’t yet known.
Red Light Therapy: Is It Right for You?
Red light therapy is a noninvasive treatment that may help with several health conditions including wrinkles, acne, hair loss, rheumatoid arthritis, and other conditions that are still being investigated. You can do red light therapy at home using devices including masks and wands, but it may be more effective at a doctor’s office where the lights are more powerful.
It’s always a good idea to consult a physician before starting a new therapy. A dermatologist can make sure your skin condition is what you think it is and can discuss the merits of red light therapy and other treatment options. For example, is a tanning salon a place you feel comfortable receiving this treatment, or might it be better to first be seen and possibly treated by a medical professional?