Interesting results. While I understand the microbes do affect how we process foods does our diet affect how they work? As in, if long term she eats grapes then perhaps either the microbes in her changed or the microbes themselves adopted a new behavior.<p>So the idea is, put a group of people on a strict diet long enough to affect which microbes they have and the exposure of the microbes to the diet. Then take three different directions from there and monitor how it all works out.