This probiotic contains 29 strains of soil based microorganisms in mineral-rich humic and fulvic acid. This is the only one that has ever truly *worked* for me, meaning I felt a difference in candida symptoms and digestion the very next morning! I would never be without this stuff, especially because our guts take a pretty heavy beating from the pesticides, metals, and chemicals we’re exposed to daily. The probiotic strains they chose are backed by peer reviewed science, and were selected to mimic the natural flora found in traditional and Paleolithic diets. I usually take one capsule at night.