"A healthy Diet may help to prevent several serious diseases such as stroke, heart disease, and type 2 diabetes. It may also help to decrease your risk of developing some cancers. If you become sick, having a healthy Diet may help you to recover more quickly. Also, the main way of preventing overweight and obesity is to eat a healthy diet. If you are overweight or obese, having a healthy Diet can help you lose weight.
As well as healthy eating, daily physical exercise is also very crucial for the health and to avoid or decrease obesity. See also the separate leaflet called Physical Activity and Exercise."