I tried eating Primal for a couple of days and it made me sick, head-achy, and no energy. I was really hungry, even though I was eating 1400 calories, and all I wanted to do was sleep. Not the plan for me. I will stick with a diet comprised mostly (ideally 90%) of lean meats, good fats like olive oil and avocados, lots of fruits and veggies, and whole grains (like bulgur wheat, yum!), with the occasional room for chocolate and ice cream!