Red yeast rice problem: Amount of substance thought to be ``pouberuric acid'' varies depending on production time. People who ingested health foods containing the ingredients of Kobayashi Pharmaceutical's "red yeast rice" developed kidney disease, etc.
About 30% of the raw material for red yeast rice produced last year was found to contain "pouberseric acid" produced by blue mold. It has been detected, but there are also periods when it is not detected, the company says.