How does blue LED light help with teeth whitening?

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How does blue LED light help with teeth whitening?

In: Chemistry

Ok, I’ll try again. It doesn’t work. The blue light is just for show to help selling whitening products. The active ingredients are not light activated at all. How do I know you might ask? I’m a dentist.

Is this just cribbing off the fact UV light had a bacterial cleansing effect so our idiot monkey brains think blue = clean?

Just a blue light would clearly do nothing.