Probiotics are the beneficial bacteria that live in our digestive tract by the billions. Advocates of probiotic supplements assert that they promote good digestion, immune system vibrance, heart health, and general well-being. However, because gut health is an emerging field of study, not enough is known about the true effectiveness of probiotics. While some tout them as a miracle cure for everything from Irritable Bowel Syndrome (IBS) to diverticulitis and cancer, other studies suggest probiotics can actually be harmful if overused. Suffice it to say that, as with all nutrients, it’s better to get your probiotics from food rather than supplements. Probiotics are naturally occurring in yogurt and certain fermented foods such as kimchi and sauerkraut. But if you’ve decided to try probiotic supplements, there are a few things to understand before deciding which one is right for you.