The problem with the classic breakfast cereals and ad-hoc store-bought snacks is that they are loaded with sugars. Practically, they contain no nutrients despite the labels indicating they’re healthy. So when we think we are eating healthy food we’re in fact eating chemicals! Don’t believe such labels: wholemeal, extra fiber, fat-free and sugar-free, diet, light, no added sugar, 100% natural, and so on. Basically if in the ingredient list of a cereal bar or smoothie you have a number of items that you can’t even read, then you’re going to eat a lot of processed stuff that your digestive system will struggle to handle.