You’ve undoubtedly heard about all the benefits of having a healthy microbiome (from us, no less) — including to digestion, heart, and brain function. So you should take probiotics, right? Not so fast. There are many problems with such supplements including, importantly, the fact that they might well be dead on arrival. “To be effective, probiotics must be either heat- and shelf-stable or refrigerated and maintained during processing and transport,” says Dr. Amy Burkhart, an integrative-medicine physician in Napa, California. If you’re thinking you should just buy the quality product, it isn't that easy. Due to a lack of close regulation of the products, we simply don’t know what companies are doing it right. To make matters worse, most probiotics out there contain just one or two strains of bacteria. Our guts are home to at least 1,000 different types bacteria. So give up the pill and eat something high in fiber like a raw salad — the guaranteed way to keep your microbiome happy.