If you've paid attention to weight loss trends or even just the Internet over the past few years, you've probably heard of the Paleo diet. Heavy on meat and vegetables and low on carbs, Paleo claims to promote weight loss and prevent disease. Although it hasn't been around long enough for researchers to find out how it does on the disease front, some people report not losing weight on the Paleo diet. So what's going on? First, let's get some Paleo basics down.