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Research on the benefits of red light therapy is ongoing. While more research needs to be done, there is some evidence that it may be useful for several health and beauty concerns.

Red light therapy for dementia

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.

The review noted that many of these studies were small and lacked controls and that larger trials need to be done before any benefits can be confirmed.

Red light therapy for pain

Research shows that red light therapy may be useful for relieving some types of pain, particularly pain due to inflammation (irritation and swelling of body tissues). A review of 11 studies looking at the effect of red light therapy on pain found mostly positive results, though the authors said that more studies are needed. In another small study, people with temporomandibular dysfunction (TMD) had less pain, clicking, and jaw tenderness after red light therapy.