MegaFood MegaFlora is a life-enhancing blend of 14 unique probiotics at an optimal daily potency of 20 billion†. MegaFlora is the ideal probiotic for individuals wanting to boost their immunity and digestive health. Supplementing with a multi-strain probiotic formula like MegaFlora is important because our bodies rely on a synergistic range of noncompeting probiotics, not just one or two, for vitality and well-being.