Description fermented red yeast rice monascus purpureus has been used for centuries throughout asia natures aid red yeast rice provides 10mg of monacolin k per daily serving monacolin k helps maintain normal blood cholesterol levels monacolin k from red yeast rice contributes to the maintenance of normal blood cholesterol levels natures aid red yeast rice capsules have been manufactured using the finest non gm european approved rice to ensure ultimate purity and efficacy suitable for veget