nature intended the human body to sort of graze all day with occasional meat-eating. If you can imagine a caveman and what he had to do for food; probably he would have eaten what he could throughout the day (berries, any veggies), and he would have killed an animal once in a while and feast on it. I doubt our bodies were able to adapt to our current diets in just a couple hundred years, which is why there are so many eating-related illnesses. I think the only reason we eat "meals" is out of convenience in our structured, digitized lifestyles. I believe the more we get back to our natural metabolic selves the healthier we'll be, meaning eating small amounts constantly, disregarding "mealtimes."