Tomorrow (Thursday) being World Obesity Day, we look at the health of an obese person what it is they can do to lose weight. The medical journals explain obesity, a disease characterized by the interaction of genetic, behavioural, metabolic and environmental factors. What is the main reason for obesity, is it the food or more to do with the biological side of things?

Guest: Tessa van der Merwe – Honorary Professor and Researcher in the Department of Endocrinology at the University of Pretoria