Gluten is the new dietary enemy. Millions of people around the world are giving up gluten in pursuit of better health.
The believers say it can cure a wide range of diseases like arthritis, depression, even autism. But is this unprecedented uptake of the diet justified? Many doctors say that if you don't have coeliac disease, you don't need to avoid gluten.
Emerging evidence is now challenging this belief.
In this special investigation, Dr Maryanne Demasi cuts through the hype of the gluten-free