It's not nice to think about, but you've got over 500 species of bacteria living in your digestive tract. Acidophilus is one of the friendly ones, helping you maintain a healthy gastrointestinal tract and combating some of the not-so-friendly ones that may enter the system.
Acidophilus helps fight digestive disorders and control vaginal yeast infections. It is especially beneficial for those taking antibiotics, which tend to destroy both good and bad bacteria. Some studies suggest it may also fight cancer and lower serum cholesterol levels.
Acidophilus is found in live culture yogurt or in supplement form. A therapeutic form should contain a minimum of 1 billion organisms per pill.