ABSTRACT
Adolescence is a critical period of growth and development. Inadequate nutrition during adolescence may increase the incidence of non-communicable diseases in adulthood. This study was conducted to determine the prevalence of underweight, at-risk-of overweight, overweight, and stunting in adolescents, as part of a project entitled "Nutrition and health education intervention program to improve the school buffets and nutritional behaviors of guidance school students". A descriptive, cross-sectional study was carried out on 780 students from 12 public guidance schools in East Tehran. Schools were chosen based on their population size and students' gender in north, south, east, west and central areas of the zone 4. Samples were selected using the systematical random method in each grade. A questionnaire was completed about demographic characteristics for each subject. Weight and height were measured and body mass index [BMI] was calculated. The Percentiles of underweight [/= 95[th]] were determined, and stunting was calculated based on height for age [