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Red, infrared and blue light therapy reduce acne symptoms. Red and infrared reduce inflammation, redness and bumps. Blue light kills the bacteria P acnes. Blue, red, or infrared work alone and in combination.
Several studies show that light therapy helps reduce psoriasis symptoms. In order of effectiveness, these lights reduce psoriasis symptoms: Ultraviolet B (UVB), Ultraviolet A (UVA), Blue, Red, Infrared
In one study, researchers used alternating blue and red light to reduce acne up to 78%. In another, they alternated between blue and red each week to achieve a 69% acne lesion decrease. In the third study, they found that differing red wavelengths both worked well to reduce acne up to 48%. In the fourth, they used a low power laser green light to reduce acne 67%.
Red light therapy significantly reduces knee osteoarthritis pain. Red light therapy grows connective tissue that osteoarthritis wears away. Multiple studies show that red light therapy significantly improves even severe osteoarthritis of the knee.
Red light treats the histamine reaction allergies cause. It reduces itchiness, redness, sneezing, coughing, and mucous production. It does not matter if pet dander or pollen triggered the allergies as red light treats the histamine response.