Red Yeast Rice is our yeast (Monascus purpureus) product containing several compounds collectively known as monacolins, which are substances shown by clinical studies to support healthy blood lipids already in the normal range.* The red yeast rice in this product is USDA-certified organic, and it is grown in the U.S. Designs for Health takes great care to assay our red yeast rice to ensure undetectable levels of citrinin and appropriate levels of naturally occurring monacolin compounds, especially monacolin K. Red Yeast Rice may support the health of the arterial lining.