Tooth Whitening can be considered one of the most desired dental procedures by patients, who are now constantly being offered a wide range of do-it-yourself solutions promising miraculous results. Thus, it is of fundamental importance for the Dental Professional to understand the mechanism of action involved in the whitening (bleaching) process, as well as the individualities to achieve more predictable results. This presentation from one of the main authorities on the subject of Tooth Whitening globally aims to discuss the different proposals on tooth whitening and offer clear understanding on the correct choice between techniques and products, both from a clinical and a scientific perspective.