It is evidently clear from the discussion that sex-specific BMI from age growth charts reveal that persons with a BMI exceeding 95th percentile are overweight. Children with BMI between 85th to 95th percentiles are at risk a risk of obesity. According to the World Health Organization (WHO), BMI rations are used instead of percentiles in determining persons with obesity. It states that persons with BMI below 18.5 are malnourished while persons with BMI of 18.5 to 24.9 are normal. those persons with BMI above 25 are overweight. The overweight group is further classified into four groups. These groups are. pre-obese whose members have a BMI of 25 -29.9, Class I obese who have a BMI of 30 -34.9, Class II obese have BMI of 35-39.9, and Class III obese have BMI above 40. The National Health and Examination Survey (NHANES) and (CDC) report of 2007-2008 on age difference shows that about 17% or 12.5 million US children and adolescents are obesity victims. This comprises 10.4% of 2-5-year-olds, 19.9% of 6-11-year-olds and 18.1% of 12-19-year-olds. The probability of adolescents being obese is higher than the probability of the kindergarten children been obese. Basing on ethnicity and gender in the United States, there are high incidences of obesity in the pediatric residents. Mexican American boys are more prone to obese than non-Hispanic white boys. Among Girls, non-Hispanic Black girls are more prone to obesity than the non-Hispanic white girls. The 2007 Obesity Action Coalition (OAC) study established the various causes of child obesity. These factors include. the environment, lack of physical activity, inheritance, family nutritional patterns, and socioeconomic status (SES). In addition, there is a decline in the activity levels and an increase in the normal intake of highly processed empty calorie foods among children and the adolescents.