Which substance is found naturally in plants and can help reduce cholesterol levels?

Phytosterols are plant-derived compounds that are structurally similar to cholesterol. They occur naturally in various plant sources, including nuts, seeds, vegetables, and whole grains. Phytosterols have been shown to help reduce cholesterol levels by competing with cholesterol for absorption in the digestive system. This can lead to lower levels of low-density lipoprotein (LDL) or "bad" cholesterol in the blood.

Stanols, often considered a subset of phytosterols, also help reduce cholesterol levels by a similar mechanism. Since they occur naturally in small amounts in some plant sources, they may not be recognized as widely as phytosterols. However, they are often added to food products in fortified forms to enhance their cholesterol-lowering effects.

Cholesterol is a type of fat that is found in animal products and is not something that reduces cholesterol levels; rather, it can raise levels in the body. Triglycerides are another form of fat found in the body and in foods but do not play a role in reducing cholesterol levels either.

Understanding the role of phytosterols and stanols in managing cholesterol levels is crucial for making informed dietary choices aimed at heart health.