Bone broth is the slow cooking for many, MANY hours (8-48 hours) of roasted animal bones and connective tissues where the minerals and nutrients can be drawn out and the collagen released. Broth by itself is usually thinner than stock because it is usually made with less bones, more meat and cooked for fewer hours. But, bone broth is a bit thicker than traditional broth. The gelatin and collagen released into the bone broth is what makes it nice and thick. And it is in this gelatin where the nutritional bang for the bone broth's buck is hiding and coveted by so many. It is also rich in protein and is a staple in the Paleo Diet.