We've been doing a lot of research into this question, filtering through the most significant studies on human health, diet and weightloss. Our conclusion... the best diet is the one you can stick to. Many find that a high protein diet leaves them feeling fuller and more satisfied while others prefer the food on a vegetarian diet so this is easier for them to stick to. We'd recommend trying out some of our different plans for a few weeks and seeing which one works best for you.