Which LED light color is indicated for acne treatment?

The indicated LED light color for acne treatment is blue light at 470 nm. This is primarily due to the blue light's ability to penetrate the skin and target specific bacteria that contribute to acne, especially Propionibacterium acnes, which thrive in oily skin and are a key factor in the development of acne lesions.

Blue light therapy has been shown to effectively reduce the bacterial population in acne lesions, leading to a decrease in inflammation and the severity of breakouts. The mechanism involves the production of reactive oxygen species when the blue light interacts with the bacteria, ultimately resulting in their destruction.

In contrast, while other colors of light have their own benefits in different skin conditions, they do not specifically target the underlying causes of acne. For instance, red light is more focused on anti-aging and healing, green light is typically used for pigmentation issues, and yellow light is often applied for improving skin tone and reducing redness, none of which specifically address acne treatment effectively as blue light does.