Obesity has become one of the biggest challenges facing the world today and is on the rise in both low and high income countries. There are a variety of factors e.g. social and economic deprivation, age, ethnicity and gender, which influence whether someone is overweight or obese. People who are overweight or obese have an increased risk of developing type diabetes, cardiovascular disease and some cancers. Excess weight can also affect self-esteem and mental health.