Last updated November 5, 2026
Snapshot
- Green light therapy is a non-invasive treatment that uses light wavelengths between 510 and 560 nanometers to trigger the body's natural repair processes.
- Circadian rhythm benefits from the therapy's effect on morning melatonin suppression and evening relaxation, which can also ease seasonal affective disorder.
- Lower inflammation and oxidative stress from the therapy can reduce chronic pain and eye strain while also speeding muscle repair for athletes.
- Skin health improves through boosted collagen production and lower melanin levels, addressing wrinkles and dark spots.
- Exposure to green light can lift mood by increasing brain activity tied to emotion and triggering a release of dopamine.
And let there be green light, the new kid on the block in LED (light-emitting diode) light therapy.
According to Heliotherapy Research Institute, the therapeutic effects of green-hued lights are based on accelerating healing and skin renewal. Today, green light therapy has uses that stretch well past skin health.
Green light may help with everything from sleep and chronic pain to athletic performance. Read on for seven ways green light therapy can support a healthier, happier life.
But First, What Is Green Light Therapy
Green light therapy, a form of phototherapy, is a non-invasive treatment that uses green light to help with a variety of conditions. The treatment exposes the body to specific wavelengths of light, typically between 510 and 560 nm, for a certain amount of time.
The therapy works by promoting the body’s repair processes. When green light penetrates the skin and reaches the cells, it may trigger a series of biological responses. These include the release of adenosine triphosphate (ATP), a molecule that powers cells, and the production of reactive oxygen species, which play a key role in cell signaling and immune function.
Green light therapy may have healing effects on body and mind alike. Green-hued light can increase alertness and focus, and it can relieve stress and tension so you feel more energized throughout the day. Research also suggests green light therapy may support better sleep for those with sleep disorders.
Seven Benefits of Green Light Therapy
Let’s take a closer look at the seven benefits of green-hued light therapy.
1. Regulates circadian rhythm and improves sleep
Light-sensing cells in your eyes help regulate your circadian rhythm, and green light may influence those cells in ways that improve sleep quality. By reducing melatonin, green light may help wake up the body and keep you alert throughout the day. Evening sessions may encourage relaxation, which can lead to better sleep.
2. Reduces chronic pain and migraine
Green light therapy may have an analgesic effect, meaning it can ease body pain. Researchers believe green light may stimulate the body’s natural pain-relieving chemicals. The treatment may also have anti-inflammatory properties, which could help inflammation-related discomfort. Studies suggest green light can lower the frequency and severity of migraine headaches, possibly by changing activity in the brain regions that process pain.
3. Improves skin health
Green light therapy may improve skin health by stimulating collagen production. This essential protein keeps skin firm and elastic, and when collagen production drops, wrinkles and sagging can follow.
Green light may also even out skin pigmentation by reducing excess melanin, which is behind dark spots and uneven tone. Green-hued light can boost blood flow to the dermis, which promotes healing and renewal. Some practitioners use it to help calm skin conditions such as eczema and rosacea.
4. Improves mood
Exposure to green light may increase activity in the prefrontal cortex and amygdala, two areas that process emotions, which can bring feelings of calm and happiness. Some researchers also link green light to dopamine, a neurotransmitter tied to pleasure and motivation. Higher dopamine levels can lift your mood and ease symptoms of depression.
5. Reduces eye strain
Green light therapy may reduce eye strain by balancing visual processing and lowering levels of harmful reactive oxygen species, which can damage vision. The visual cortex, the part of the brain that processes visual information, can become more active under green light. The added activity may make it easier to focus and ease tired eyes.
6. Enhances sports performance
Green light therapy may speed muscle repair, which is one of the main ways it could boost sports performance. By reducing inflammation and oxidative stress, it can hasten healing and improve all-around performance. The therapy’s sleep benefits may also help, since restful sleep supports quicker reflexes and better decision-making.
7. Manages seasonal affective disorder (SAD)
SAD is a form of depression tied to the change of seasons, and it often shows up in fall and winter when daylight is scarce. A study comparing green and red light therapy found green to be more effective, though the study was small, and researchers believe the effect works through light-sensitive cells in the eyes. Green light may also ease depression by supporting your circadian rhythm.
Making Green Waves
Green light therapy is generally safe and non-invasive, and you can use it on its own or with other therapies. Light therapy works best as a complement to standard medical care, so talk with your doctor before starting any new treatment.
Green Light, Go
What is the difference between green light and red light therapy?
Red light uses longer wavelengths that reach deeper into the skin, which is why it’s popular for muscle recovery and collagen support. Green light has a shorter wavelength and is often used for surface concerns like uneven skin tone, and researchers are studying its potential for migraine relief.
Can you do green light therapy at home?
Yes. At-home options include green LED face masks for skin and green light lamps for relaxation. In one University of Arizona study, migraine patients who sat under green LED light at home for one to two hours a day reported fewer headache days.
