“Blue and red LEDs are medically proven to relieve pain, increase circulation, enhance gum health, freshen breath, and, yep, whiten teeth. The dpl® Oral Care Device is one of the most advanced over-the-counter whitening systems you can buy, and it works wonders. Blue light helps reduce bacteria, causing a whitening effect, while red and infrared lights improve gum health by increasing blood flow.”—Barret Wertz