Obesity is a disease characterized by the presence of an excess of fat mass (fat) in the body and for weight gain, usually due to a disproportionate food intake. This condition is easily diagnosed by assessing the body mass index and overall constitution of the person. The sum of factors that cause this disease, typical of the XXI century, include a sedentary lifestyle, a poor dietary patterns, and genetic and environmental factors. On the other hand, obesity is often aggravated by a number of other associated diseases, such as diabetes, cholesterol, triglycerides and hypertension, in addition to incur certain social rejection and lead to psychological problems. Also among the population suffering from this disease, there is increased risk of cardiovascular events, particularly in patients with abdominal obesity (an indicator of insulin resistance). The treatment of obesity through the monitoring of the recommendations of endocrine and nutritionists, based on a good individualized dietary plan, and changes in daily routines, especially when it comes to exercise. It is also important to establish these guidelines from childhood to avoid the appearance of so-called childhood obesity.