Plant stanol esters are widely used in functional foods, particularly in cholesterol-lowering margarines and spreads. They work by inhibiting the absorption of dietary and biliary cholesterol in the intestines, which helps reduce low-density lipoprotein (LDL) cholesterol levels in the blood. Regular consumption of foods fortified with plant stanol esters has been shown to support heart health and is often recommended as part of a dietary approach to manage hypercholesterolemia. These compounds are also added to certain dairy products, salad dressings, and dietary supplements aimed at promoting cardiovascular wellness. Their effectiveness and safety have been recognized by health authorities, making them a key ingredient in many over-the-counter cholesterol-reducing products.