There are many forms of probiotics. They are commonly found in foods and beverages that have been fermented, like certain dairy products, kombuchas, yeast products, and certain dairy-free products. There are different healthy bacteria strains, so some probiotic supplements and probiotic-rich foods may contain one or more different strains. Some of the common healthy strains used in supplemental form are Lactobacillus acidophilus, Bifidobacterium bifidum, and Bacillus coagulans. Probiotic strains are also often found in supplement forms within capsules. Most of these capsules are daily supplements that can be implemented in your everyday life.