It might surprise you to learn that chronic diseases are the most significant cause of death and disability worldwide. In fact, three in five Canadians over the age of 20 have at least one chronic disease, such as cancer, diabetes or heart disease. Obesity and being overweight is a huge contributor to chronic diseases. Today, one in four adults in Canada is obese, and a third of all children are already overweight or obese. These are startling numbers. And they relate to a trend that is reversible.