This book has a lot of great info about our gut, optimal food choices, and healthy habits. I was interested in it because I have IBS and can't seem to expand my low FODMAP diet to include any higher FODMAPs. I did not learn much new. After two years of learning about gut health it seems I do almost everything he suggests except I am not on an exclusively plant based diet. I do like how he includes asides on modifications for low FODMAP folks. He also ascribes to the theory that if you ramp up your fiber and only eat plants your gut will heal and you can eat more FODMAPS . Maybe? It seems he is preaching to those on a typical American diet (processed foods) and lifestyle (sedentary), which is not me. 

I'd love to try his four week plan. But honestly, I would need a chef to take care of the buying and cooking for me. And this is from a person who loves food and cooking. I already focus far too much on food and this would consume my life for four weeks. Would be anxiety producing and not healthy for me. 

What I think I will do is try to shift to more plants. And use some of his recipes. Maybe try week one. Maybe buy the cookbook that goes with this. We'll see...