The anecdotal evidence supporting the powers of blue LED light to treat acne is compelling. And so is the science.
It helps fight acne due to blue light wavelengths that penetrate the skin and produce singlet oxygen which can destroy acne-causing bacteria. Once the blue light treatment is delivered, this light energy is absorbed by the targeted bacteria that produce the inflammation associated with acne known as propionibacterium acne's, or P. acne.
P. acne releases porphyrins, which are naturally occurring molecules in the body. When porphyrins absorb certain wavelengths of light, free radical damage is produced which destroys the bacteria. Without P. acne's around to cause inflammation, acne is reduced. This isn't just snake oil, the FDA approved narrow-band, high intensity blue light for treating acne.
The Dermatology Times reported in 2006 about the benefits of using blue light to fight acne. A study demonstrated that just 15 minutes of blue light reduced moderate acne. A Brazilian study showed that skin lesions were down 50 percent after three weeks and 60 percent after five. All the studies we found showed positive results for mild to moderate acne. Severe acne sufferers should consult a dermatologist before buying a blue light.