World Health Organization (WHO) reported that developed and developing, both countries are suffering from childhood obesity. Childhood obesity has increased nationally and internationally. This can be reduced by focusing on prevalence, cancer association with obesity, risk factors and preventive measures of worldwide childhood obesity. Vitamin D and calcium both are inversely associated with obesity in children. So, supplementation of both micro-nutrients is warranted in childhood obesity. Some natural products in the form of diet are also helpful in reduction of obesity namely; prebiotics, probiotics and fatty acids.