Bacteria is usually viewed in a negative light as something that makes you sick. However, we have two kinds of bacteria constantly in and on our bodies — good bacteria and bad bacteria.

Probiotics are live microorganisms, usually bacteria, that are like the healthy bacteria found in the human digestive tract. When eaten in proper amounts, they yield a health benefit, not the least of which is supporting your immune function and controlling inflammation.

Though there are many types of bacteria that can be considered probiotics, there are two specific types of bacteria that are common probiotics found in stores. These include Lactobacillus and Bifidobacterium.

Probiotics are also made up of good yeast, and the most common type of yeast found in probiotics is Saccharomyces boulardii.