[header] How to buy acidophilus [title] Learn what acidophilus is and what it's used for. [step] This naturally occurring " good bacteria " helps to break down food in your colon and protect against " bad bacteria. " though you can ingest it through food, you can't get adequate amounts that way. 
For the best results, you should take a supplement as well to help with various gi issues and other conditions. Though there are many types, lactobacillus acidophilus is the most commonly used probiotic.