Probiotics update: the latest word on these friendly bacteria.(Wellness: supplements and functional foods)

Probiotics, such as the Lactobacillus acidophilus strain commonly found in yogurt, have traditionally helped people maintain healthy digestive systems. Years ago, the human body generated reserves of these friendly bacteria, but antibiotics, chlorinated water and other modern innovations can deplete natural supplies. As a result, the popularity of probiotic supplements has soared, making it vital to keep abreast of the latest research.

People considering probiotic supplements should seek advice about the quality of the product from a health professional, says S.K. Dash, PhD, former director of the South Dakota Food and Drug Administration and founder and president of UAS Laboratories in Minneapolis. Selecting a product that contains safe, quality bacteria in sufficient amounts is essential. Consumers must be especially wary' of impressive label claims. About 70-80 percent of probiotic products do not contain their claimed amount of live probiotic microorgauisms, says Dash.

Surviving the Stomach

Adding to the false-label-claim hazard is the fact that stomach acid destroys many probiotics before they reach the intestines, which is why some probiotic products must be taken in the morning when stomach acid levels are lowest. In response, some companies are developing new pill-coating methods to keep probiotics intact and alive as they pass through stomach acids.

One such coating method appears in Acidophilus Pearls, a product that Enzymatic Therapy Natural Medicines of Green Bay, Wisconsin, introduced in July 2002. Three layers surround and protect strains of Lactobacillus acidophilus and Bifidobacteria longum in Acidophilus Pearls, says Cheryl Myers, director of product development at Enzymatic Therapy. The first layer suspends the bacteria in oil, while the second shields the oil from the elements. The outermost layer is designed to dissolve in the alkaline environment of the intestines, keeping the pill intact when it comes in contact with stomach acid. As a result, Acidophilus Pearls deliver more than 90 percent of their live probiotics to the intestines, Myers says.

Similarly, BioTract pills, made by Nutraceolix in Redmond, Washington, deliver 60-80 percent of their label claim of Lactobacillus salvarius. Instead of coating the entire pill with a protective substance, cellulose surrounds each of the individual bacteria in the pill, says Brenda Watson, ND, a colon therapist and author working with BioTract. The pill doesn't activate until it hits the pit of the stomach, where it turns into a gel.

Both new pill coatings provide the convenience of being able to take the pill anytime, day or night.