Unhealthy weight control behaviors, disordered eating, and body image dissatisfaction in adolescents from São Paulo, Brazil.

Objective: To identify the frequency of disordered eating (DE) and unhealthy weight control behaviors (UWCB) among adolescents and associations with age, sex, actual weight status, perceived weight status, and body image dissatisfaction.

Methods: Cross-sectional study of 1,156 adolescents. DE was assessed using a specific self-report questionnaire, UWCB by specific behaviors that were not typically recommended for weight management, and body dissatisfaction by Stunkard's silhouettes.

Food intake and meal patterns of adolescents, São Paulo, Brazil.

Objective: To assess food intake and meal patterns in adolescents, a cross-sectional study was conducted with 228 adolescents from a public school, SP, Brazil.

Methods: Total energy, macronutrients, calcium, iron, and vitamin A intakes were evaluated. The food pattern was compared with the eating patterns established by the Food Pyramid for adolescents.

The role of selenoproteins in cancer.

Evidence has shown that metabolic disorders are common in tumor cells, leading to increased oxidative stress. The increase in the production of reactive oxygen species (ROS) associated with low antioxidant activity has been related to several types of cancer. Selenium, an antioxidant micronutrient, may function as an antimutagenic agent, preventing the malignant transformation of normal cells.