See her Part 3 article at Whole9Life.com. For example:
The priority with whitening should come after health is established. Then, whitening is appropriate, kinda. Zoom whitening is for instant-gratification folks with money to burn. If you are going to whiten your teeth, first just buy some Crest White Strips (around $40) and see how you like the result. If they work, you’re done. If not, you may invest in professional trays and bleach (around $400). The chemicals in these products are mostly the same, and the Zoom (not so magical) light simply adds the factor of heat, which we all know quickens chemical reactions.
There are really not many long term studies on what bleach does to your teeth, and the industry assumes it is pretty safe. Just know that if you are in the process of whitening your teeth, stay away from chromogenic foods like blueberries, red wine, and coffee. You can really embed that stain into your teeth if you do it along with a series of whitening.