摘要:http://dx.doi.org/10.5902/223613086577 Currently there has been a large consumption of foods with excess sugar by teenagers, mainly dueto its availability in the market and the economic and cultural interests of the environment inwhich they live in. It becomes necessary, therefore, to intervene in food education, throughfamily, school or training groups, because this demographic group is an easy target for the mediaand strong economic interests, to whom the health of consumers is of the least importance. Themain objective of this study was to evaluate the efficiency of extra-class activities (lecturedialogue),with health professionals in teaching teenagers about nutrition. We obtainedinformation on the knowledge and eating habits of students from eighth grade (9th grade) and thefirst grade of high school (secondary schools), from both the public and private school system inSanta Maria, RS. The subject was approached through investigative questionnaires before andafter the awareness actions, called pre-test and post-test respectively. After the lecturesdialogues,awareness levels increased among the studied group and there was a clear indication ofthe intention of reducing the consumption of sugar and sugary products. The school as a learningvehicle appears to be an appropriate place to discuss nutrition and health education issuesbyproviding a sustainable education of strong base and multipliercharacter.