Philips Zoom Day White offers superior at-home whitening for a visibly whiter smile in one day and your whitest healthiest smile in seven to fourteen days. Over 10 million patients have had their smiles brightened by a Zoom treatment. We understand that patients have different needs when it comes to whitening-that's why we've designed three different Zoom products. Philips Zoom Whitening are the only at-home whitening products to contain amorphous calcium phosphate (ACP), which is clinically proven to reduce sensitivity, protect enamel and help improve the luster and smoothness of the teeth.