Lactobacillus acidophilus is a “friendly” type of flora that colonizes the gastrointestinal, urinary, and vaginal tracts. Acidophilus inhibits the growth of “unfriendly” types of microorganisms such as bacteria, yeast, and parasites and prevents them from overpopulating.
Acidophilus is commonly used to treat yeast infections, improve digestion, and alleviate diarrhea. Recent studies indicate that acidophilus may offer some protection against colon and breast cancer by discouraging the re-absorption of estrogen back into the blood stream.