As part of a heart-healthy eating plan, consuming phytosterols in recommended quantities has been shown to lower total cholesterol up to 10% and LDL or “bad” cholesterol up to 14%.

Why does phytosterols reduce cholesterol?

This is particularly effective for people who have high cholesterol — whether or not they're taking cholesterol-lowering statin drugs ( 6 , 8 ). Phytosterol is believed to work by competing for the same enzymes as cholesterol in your gut, effectively preventing cholesterol from being absorbed ( 1 ).

What are the side effects of phytosterols?

The current evidence suggests that phytosterol supplements are relatively safe and well-tolerated. 5 Side effects, if any, tend to be mild and may include constipation, nausea, upset stomach, heartburn, flatulence, and the discoloration of stools.