The consumption of energy drinks is very frequent in adolescents and young people who ignore the negative consequences at cardiovascular level, endocrine system and in the index of corporal mass. That's why, the present study tries to analyze the negative effects of the consumption of the energy drinks in students of the careers of engineering of universities deprived of Lima - Peru. The sample was of 150 career of engineering students (97 men (64.7 %) and 53 women (35.3 %) between 16 to 29 years of age (M = 19.50, SD = 2.48) of Lima - Peru. One concludes that 70 % between the 17 to 22 years consumes energy drinks and of similar form in males and women. 54.3 % consumes them because they want to feel with more energy and because they have to study in the nights. Finally it was identified that the consumption frequency is related to a less quantity of hours of sleep, and mixing the drinks with other substances was related at the level of knowledge of the negative effects and also with the least tendency to do sports.