The word "probiotic" is used to describe organisms that are used for medicinal purposes. The probiotic bacteria known as Lactobacillus acidophilus normally live in the human small intestine and vagina. This bacterial species is considered beneficial to the body, says the Mayo Clinic, because it produces lactase, vitamin K and anti-microbial substances like lactocidin, bacteriocin, acidolin and acidolphilin.
Acidophilus Claims
Acidophilus promoters have claimed that the bacteria are responsible for boosting health in a number of ways. It is purported to help maintain a healthy intestine, treat vaginal infections, help lactose digestion and lower cholesterol. The American Cancer Society notes that claims have also been made that acidophilus could reduce the risk of cancer by neutralizing carcinogens consumed in the diet, but warns that there have been no studies performed on humans testing these claims and that the results from studies on animals have been mixed.
Acidophilus Functions
According to the University of Maryland Medical Center, Lactobacillus acidophilus breaks down food in the small intestine, helping to form lactic acid and hydrogen peroxide. These acids then discourage the growth of non-beneficial bacteria and help maintain bacterial balance in the digestive system. Since antibiotics target and destroy both beneficial and non-beneficial bacteria, probiotics like acidophilus are sometimes suggested to be taken several hours after antibiotics.
Recommended Dosages
Since acidophilus is sold as a dietary supplement in the U.S., the Food and Drug Administration has not set a daily recommended intake for the bacteria. Acidophilus, when recommended by your healthcare practitioner, is prescribed in doses that refer to the number of colony-forming units, or CFUs. Depending on the health condition being treated, dosages between 1 to 15 billion CFUs may be recommended. For daily intestinal health maintenance, take 1 to 15 billion CFUs per day.
Getting Acidophilus
The most common primary food sources of acidophilus include enriched milk and yogurts, tempeh and miso. A number of yogurt companies add acidophilus to their yogurt; look for yogurt products that state "live cultures" on the container. Acidophilus is also used to create fermented milk products, such as buttermilk. Acidophilus can also be taken as a supplement in granule, powder, liquid or capsule forms. Look for supplements in your local health food store.
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