Objective. In Russia, there are some continuing negative trends in children's health such as an increased incidence rate, including chronic disease, retardation and deceleration of physical development, increased incidence of neuroticism. The study objective is to determine contemporary tendencies of children and teenagers health using longitudinal study and taking into consideration dietary habits. Methods. 1542 school children were double examined (7-17 years old) of the 1st and 2nd health groups. Physiometry was conducted according to generally accepted methods with the use of standard equipment and was complemented with questionnaire survey. Mental health was assessed by criterion 'presence/absence' Clinical and biochemical blood indexes were also assessed. Results. It was discovered that the levels of general and primary morbidity increased by a factor of 2.5, including respiratory organs diseases (40 %), traumas and intoxications (35 %), derma diseases and diseases of subcutaneous fat. 97.2 % of girls and 89.9 % of boys had burdened anamnesis and lowered resistance. Physical development indexes were characterized by a high rate of abnormalities (each 4-5th case). Conclusions. Only 48.9 % school children had a harmonious physical. It was registered a misbalance of body components. The number of children who had eaten in school cafeteria decreased. Poor daily nutrition was determined by insufficient fuel value, protein, lipid, magnesium, calcium, vitamins A and C gap along with an excessive intake of carbohydrates. By a cluster analysis we determined the risk groups of health problems and developed individual recommendations using the 'traffic light' diet, it was recommended to conduct bioimpedansometry in decreed time limits.