Walk through any grocery store or pharmacy and you'll see shelves lined with probiotic capsules, gut health gummies and powdered supplements promising better digestion and a healthier microbiome. The problem is that most people buying them don't fully understand the difference between a prebiotic vs. probiotic. And those that do don't know whether those expensive supplements are even doing much at all. Gut health experts say the bigger answer to solving your gut imbalance may be far less exciting: eat better food. Here's what you need to know. Prebiotic vs.