Beneficial bacteria in the stomach help regulate digestion and balance levels of harmful bacteria that can cause intestinal problems, such as diarrhea and intestinal inflammation. Some bacteria settle in the stomach; others pass through to inhabit the intestinal tract. Normally, levels of good stomach bacteria fluctuate based on diet and health. Although some beneficial bacteria naturally occur in food, such as yogurt, ongoing research of healthy bacteria that survive the harsh stomach environment (probiotics) allows many to be found in probiotic-enhanced foods and supplements.
Lactobacillus
Lactobacillus is a multi-familial strain of beneficial bacteria that raises the acidity level inside the stomach. This aids in destroying other microorganisms such as yeasts and harmful bacteria, which can cause infection and digestion imbalance. Lactobacillus casei, part of this bacterium family, has been studied for its additional effects on regulating the digestive system. It can be frequently found in foods such as live-culture yogurt. The possibility that members of the Lactobacillus family--such as Lactobacillus reuteri and Lactobacillus acidophilus--can have a positive impact on reducing cancer cells and boosting immunity is part of ongoing research into the benefits of this group of probiotics.
Streptococcus Thermophilus
Important for producing lactase enzymes, which digest milk and dairy product, Streptococcus thermophilus is an additional bacterium that raises stomach acidity to ward off harmful organisms. Found in fermented dairy products, such as yogurt, this bacterium protects the gastrointestinal lining while digestion of dairy products takes place. A 2002 study by the American Society for Microbiology found that active Streptococcus thermophilus bacterium in the gastrointestinal system can help protect against lactose intolerance and reduce intestinal discomfort in people who have trouble digesting dairy.
Bifidobacterium
This multi-functional bacteria passes through the stomach and ultimately resides in the large intestine. A protector against yeasts and harmful bacteria, Bifidobacterium inhibits the growth of microorganisms that can cause intestinal inflammation and diarrhea. "Natural Stomach Care;" by Anil Minocha, M.D. (2003), states the importance of this bacterium in the manufacturing of vitamin B, as well as its ability to maintain healthy intestinal flora and balance. Additionally, Bifidobacterium is known to be prolific in the digestive tracts of newborns and infants as a shield against diarrhea and dysentery.
Escherichia
Most notorious for the infectious strain, E. coli, this bacterium group offers friendly strains that benefit digestive health. Found in the stomach, members of the Escherichia family are responsible for breaking down foods such as vegetable and plant matter. Additionally, Escherichia are responsible for the production of vitamin K, a necessary nutrient for the production of blood-clotting cells.
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