The objective of this study was to verify and compare the level of information about dental whitening among dentistry students. Thirty students voluntarily participated in the study by answering a questionnaire. The questions focused on dental whitening with the following topics: use of LED light during the process, white diet, creation of reservoirs in whitening trays, use of anti-inflammatories and over-the-counter products, recommended time interval between whitening sessions, and waiting period before replacing composite resin restorations after treatment. A descriptive analysis was performed, presenting the data in terms of frequencies and means. The age range was broad, between 17 and 47 years. For 66.7% of the interviewees, creating a reservoir in the individualized tray is necessary. Regarding over-the-counter products, 90% were not familiar with them. Considering the interval between whitening sessions, 43.3% thought it should be seven days. Regarding anti-inflammatories, 53.3% did not know how to give an opinion. Regarding the use of LED light associated with in-office whitening, 33.3% believed in an improvement. A white diet was recommended to patients by 40%. For post-treatment restoration, 60% of participants were divided between one week (36.7%) and a minimum of 15 days (23.3%). Therefore, the research showed that many distorted narratives about dental whitening are still transmitted among students, such as adherence to a white diet during whitening treatment and the association of LED light during in-office whitening to accelerate the change in tooth color.