For an extra strength probiotic for your extra busy lifestyle of family, work, and finding time to care for yourself, choose Nature's Way Fortify Women's Extra Strength** Probiotic 50 Billion. This more potent daily probiotic option is specially formulated for women with diverse, researched probiotic strains to help support digestive, immune, and women’s health.*† Each serving provides 50 billion live probiotic cultures, plus prebiotics, a food source for good bacteria.* No refrigeration required, so they’re easy to take on the go. (†Compared to Fortify™ Women’s 30 Billion Probiotic formula.)