There is one particular microorganism in the human intestine called lactobacillus, which helps digest and absorb food, prevent infection and activate the immune system. With its enormous offering of nutrients and resulting natural intestinal health, BAC is a great substitute to a lactobacillus supplement. BAC can activate our natural lactobacillus in the intestine and help improve the absorption of vitamins B1 and B2 and many other vitamins and nutrients.