The importance of understanding our personal bodies and how they process food differently was central to your last book spoon fed and place apart in your new book. And that's not just a single set of instructions for everyone, we need to understand our individual bodies because as I understand it we process sugars and I guess also fats quite differently. Yes, when we started Zoe the very first big research project we did was to get 1000 twins and 100 volunteers in Boston to take identity have an identical meal at identical time. The study understood where they were in their sugar and their fat peaks, that would make a big difference long term in how much stress they're causing their body. It turned out that no two people