Also known as the Paleo, or Paleolithic Diet, or Neander-thin, this plan claims that if we eat as our caveman ancestors did, we will lose weight.  The theory is that foods that are derived from agriculture and technology are bad for us, and that the healthiest way to eat foods is in their closest-to-nature form. Basically, it’s a low carb diet.  It eliminates processed foods, all baked goods, coffee, alcohol, beans, sugar, artificial sweeteners, and starchy vegetables.