The Revian Red system is indicated to treat pattern hair loss or androgenetic alopecia, a genetically inherited type of hair loss. It is also clinically proven that red light therapy and specifically nitric oxide release helps reduce inflammation, increases blood flow , and “re-activates” the scalp helping hair follicles renew. Revian can make a positive change for you by slowing hair loss and re-growing and strengthening your hair. Since it is a light-based therapy, there are no chemicals to apply or drugs to ingest, so it is also very safe. The Revian Red precision LEDs are 620 and 660nm wavelengths that have NO harmful or polluting radiation. Our cap contains no UV light known to induce abnormal lesions of the skin.