Smoothies have become a ubiquitous meal replacement, usually consumed on the fly and loaded with blended ice, dairy, raw veggies, frozen fruit and protein powder. Easy and nutritious, they're great for getting in several servings of fruits and vegetables on days when you're in a hurry. However, there are some digestive downsides to smoothies. The short of it: cold food, raw vegetables and dairy are actually three of the most energetically difficult things for your Stomach and