Pharmacology Action: Promotes healthy cholesterol levels Supported by clinical reaseach, In the natural form of solid red yeast rice fermentation Monacolin kind compounds include acid form and lactone form. Among them only acid form is Monacolin active form lowering lipid medicament.This shows in red yeast rice the exist of open-ring or close-ring Monacolin and the proportion of open-ring and close-ring Monacolin are the simple ways to judge that Monacolin red yeast rice is added artificially or formed through natural fermentation. Through HPLC detecting, this way can be realized. The result is obviously shown from the character absorption apexes in the HPLC charts.