No dosage standards have recommended for red yeast rice. Still, the suggested adult dosages range from 1.2 to 2.4 grams/day to 0.8 grams per kilogram of body weight per day. In Asian countries, the average daily intake of red yeast rice is 14-55 grams.
Earlier research performed by The American Journal of Clinical Nutrition, February 1999 had found that red yeast rice supplements could reduce LDL (bad) cholesterol. In another study, the combination of fish oil and healthy lifestyle changes, the supplements worked as well as a statin drug (Mayo Clinic Proceedings, July 2008). This study carried out on 74 people who are having high cholesterol assigned either to take statins or red yeast rice and fish oil supplements (as well as proper diet, exercise, and relaxation). After three months, LDL dropped by about 40 percent in both groups (statins and red yeast rice), according to lead researcher David Becker, M.D., a cardiologist at the University of Pennsylvania Health SystemRed Yeast Rice for High Cholesterol | 6 Medicinal Uses of Red Yeast Rice
Be aware of potential side effects and interactions with food, drinks, drugs. Check with your doctor before starting to take this supplement/food and for dosage.