This week on March 4th, it was World Obesity Day, which aims to address the causes of obesity and how to medically treat.

It is one of the world's fastest-growing diseases, but many still think of it as being the result of eating too much and not exercising enough - when in reality, there are a number of genetic, behavioural, metabolic and hormonal influences on body weight.

Wellbeing expert Erin O'Hara joined Francesca Rudkin to discuss prevention and ways to lose weight.

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