Re: vegan diet, I couldn't find the video but his q&a says vegans can use 'vegan meat substitutes' for protein and a probiotic for the yogurt. (The diet includes other probiotics than yogurt, among which are tempeh, sauerkraut, and kimchi, so if you like any of those you can use them.) The diet is basically an expanding set of food lists and directions on how to use them, for example you start off with unlimited (but 'reasonable') allowed proteins and vegetables from lists, 2 low-sugar fruits off a list, 2 probiotic foods, condiments off a list, and 1-2 tablespoons of 'friendly fat' (olive oil or flaxseed oil). After the first 17 days more choices are added to the proteins, starchy vegetables, legumes, and certain grains are added, similar expansion for 3rd and 4th / maintenance stage. If you are confident of putting together your own recipes/menus substituting 'vegan protein' in the protein slot you could use the diet to manage overeating of fruit, starchy vegetables, etc. and it would probably work. As a non-vegetarian I've been scrambling to work through fish, chicken, turkey & egg recipes for cycle 1 and it is both a challenge and a big enough set of choices to work with. Patricia, if you eat milk products (including yogurt, light cottage cheese, etc.) I would expect you could do this diet if you added in some vegan protein for variety. Bottom line, if you're used to cooking a variety of meals that aren't from the freezer (or eating a bunch of someone elses home cooking) you'll have to do some homework getting a variety of appropriate recipes somewhere else in the long run. However, this diet can do a good job teaching you a sliding scale of what is more or less fattening not only for meats but for fruits, vegetables, grains, and processed foods.