This document provides information about obesity, including definitions, causes, effects, and prevention strategies. It defines what is meant by "healthy" and explains how body mass index (BMI) is used to determine if someone is obese. The main causes of obesity discussed are consuming poor quality, fat-rich food and lack of physical activity. Effects mentioned include increased risks of diabetes, heart disease, and certain cancers. Prevention strategies recommended are keeping physically active, taking a balanced diet, avoiding eating out, and being cautious of food labels.