If you’ve ever stood in the supplement aisle wondering whether to grab the refrigerated probiotics  or the shelf-stable bottle , you’re not alone. The packaging and storage instructions can be confusing—but they actually tell you a lot about the type of bacteria inside and how the product works. Let’s unpack the differences, so you can choose the probiotic that fits your lifestyle and health goals. The Basics: What Makes a Probiotic Shelf-Stable or Refrigerated? Probiotics ar