The bacteria Oxalobacter formigenes (O. formigenes), a naturally occurring bacterium that has no known side effects, is associated with a 70 percent reduction in the risk of recurrent kidney stones. According to the researchers, up to 80 percent of kidney stones are predominately composed on calcium oxalate (CaOx) and urinary oxalate is a major risk factor for CaOx stone formation. O. formigenes metabolizes oxalate in the intestinal tract and is present in a large proportion of the normal adult population.
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