Obesity is defined as having excessive body fat that increases health risks. It is caused by consuming more calories than burned through diet and lack of physical activity. Obesity contributes to health problems like high blood pressure, diabetes, certain cancers, and heart disease. To encourage healthy habits in students, schools should provide nutritious lunch options, teach the food pyramid, require daily exercise, and limit fast food and sugary vending machine snacks. Developing healthy attitudes and lifestyle habits early can help prevent obesity and related diseases.