What are probiotics and how do they work?

Probiotics are beneficial bacteria that play an important role in balancing the microflora—the microscopic bugs that inhabit all living things—in the gut. We’ve been consuming probiotic bacteria through fermented foods like sauerkraut, kimchi, sourdough bread, buttermilk and yogurt since roughly forever. These days, you’ll also find foods that are fortified with probiotics (like chocolate), as well as probiotic supplements.

The human body—and specifically the large intestine—houses trillions and trillions of bacteria. And while bacteria have the reputation of being undesirable, there are actually many different types of bacteria: some good, some not so good, and some neutral. The so-called good bacteria, also known as probiotics, keep bad bacteria in your gut from multiplying to an unhealthy amount. As a result, they help keep your digestive tract working correctly, boost your immunity, help you process food, and more.

Talk to your local Walgreens pharmacist and doctor about how to ensure you’re getting enough probiotics.