Answer :Studies often use formulations that are not commercially available, but you can buy phytosterols in supplement form wherever youd shop for vitamins. Look for wording on the label such as Plant Sterols/ Stanols. The National Heart, Lung and Blood Institute recommends 2 grams (2,000 milligrams) daily for people with elevated LDL cholesterol; in typical supplement doses, that may mean taking two pills twice a day. A recent study suggested that higher doses are associated with greater LDL cholesterol reduction, but until those findings are confirmed its best not to overdo it.