Efficacy and role of probiotic powder Probiotic powder is a food ingredient composed of a variety of active bacteria. It can repair intestinal flora, enhance intestinal immunity, regulate intestinal function, and help improve human health. . Probiotics are selective intestinal microorganisms that can inhibit the reproduction of harmful bacteria in the intestine, help maintain the balance of intestinal microecology, and improve intestinal health. Below, we will detail the nutritional value, immunity enhancement, disease resistance, and side effects.