Chicken fat, beef fat, fish fat, fried foods - these are the foods that fuel our fat genes by giving them raw materials for building body fat.

In my own life, I decided to leave meat off my plate in medical school, but was a bit slow to realise that dairy products and eggs are not health foods either.

We help people to begin truly healthful diets, and it is absolutely wonderful to see, not only their success, but also their delight at their ability to break old habits and feel really healthy for a change.

I have been following a vegan diet now since the 1980s, and find it not only healthier, but also much more attractive than the chunks of meat that were on my plate as a child.