Probiotics capsules contain the beneficial bacteria normally present in the digestive tract. Probiotic supplements are vital for proper digestion, break fats and proteins down, prevent the stagnation of food, manufacture immune enhancing compounds and also perform a number of other useful functions, such as preventing an overgrowth of yeast and other pathogens. The use of preservatives in food, cooking food which destroys the good and the bad bacteria and overuse of antibiotics are just some of the reasons for using a good probiotic supplement.