High body mass and obesity are of interest as a medical and social problem of the XXI century. Already at school age, many children have high body mass and obesity, one can state metabolic abnormalities in the serum lipids, carbohydrates, thyroid status. In the study, there have been examined 112 schoolchildren-nonresidents living in the Khanty-Mansiysk Autonomous Okrug: 44 - with high body mass and obesity, 68 - with normal body mass. In the group of the persons with high body mass and obesity, there have been determined reliably higher indices of general cholesterol, low-density lipoproteins, triglycerides (TG), glucose, glycohemoglobin and thyreotrophin and reliably lower indices of high-density lipoproteins and T3. There has been observed a positive correlation between glucose concentration and content of glycohemoglobin in blood (r = 0.983, p = 0.000), general cholesterol (r = 0.455, p = 0.002), triglycerides (r = 0.389, p = 0.034), free thyroxin (r = 0.314, p = 0.038). The level of glycohemoglobin correlated with the content of general cholesterol (r = 0.477, p = 0.001), triglycerides (r = 0.381, p = 0.038). The schoolchildren with high body mass and obesity had higher indices of carbohydrate-lipid metabolism and the thyroid status compared to the control group, what could cause a cascade of metabolic pathological states in young adult life period in the future.