Probiotics don’t quite have the reputation they deserve…yet. As of now, they’re probably something you see as optional–kind of like taking vitamins, exercising a little more, and cutting out red meat. But we should actually look at probiotics as mandatory. They aren’t just foreign substances we can add to our body if we want. Probiotics occur naturally in the body, but many of the foods we drink deplete our natural levels of them. You may wonder why people thousands of years ago didn’t have to take probiotics. Well, A) They didn’t have Whole Foods so, they couldn’t and B) They didn’t eat food that had been so highly processed that it disrupted the balance of their delicate digestive systems. More than ever, today we need to take probiotics. So if you want to know more about these little live bacteria nutritionists rave about, here are surprising facts about probiotics.