A quantitative, controlled, cross-sectional, clinical trial will be carried out involving 130 teenagers. All individuals will be submitted to evaluations with Oral ChromaTM for the diagnosis of halitosis (scores SH2 ≥ 112 ppb and CH3SH ≥ 26 ppb) at the beginning of the study. Three post-treatment evaluations will be carried out: one hour, 24 hours and one week after treatment. The subjects selected will be randomly allocated to five groups: