Lactobacillus Acidophilus can survive happily in acidic environments. It survives best in enviroments with a ph of 4.5 or lower. Even though it can live in these acidic environments, it can be killed by too much moisture, heat, or direct light. This bacteria can also be killed by antibiotics, but it can be replaced in your body with supplements. Lactobacillius Acidophilus is Aerotolerant, meaning it does not utilize oxygen, but it has the enzymes it needs to the detoxify the poisonous forms of oxygen. This bacteria burns its energy it gets from turning lactose into lactic acid. This process happens by adding enzymes to lactose and the molecule splitting up into Glucose and Galactose. The process of turning lactose into lactic acid is demonstrated to the right: