What is believed to reduce the metabolism of cholesterol and triglycerides?

Niacin, also known as vitamin B3, plays a significant role in lipid metabolism, and its ability to reduce cholesterol and triglycerides is well-documented. It works primarily by inhibiting the breakdown of fat in adipose tissue, which leads to a decrease in the release of free fatty acids into the bloodstream. This reduction in free fatty acids lowers the liver's production of very low-density lipoprotein (VLDL), a precursor to triglycerides, ultimately leading to lowered levels of triglycerides and low-density lipoprotein (LDL) cholesterol in the blood.

Additionally, niacin also increases high-density lipoprotein (HDL) cholesterol, often referred to as "good" cholesterol, which further aids in cardiovascular health by removing excess cholesterol from the bloodstream. This multifaceted action makes niacin an effective option for managing lipid levels, thereby contributing to better cardiovascular outcomes.

While other options may also influence cholesterol and triglyceride levels, niacin is specifically recognized for its comprehensive impact on lipid metabolism, particularly its unique ability to lower triglyceride levels while simultaneously increasing HDL.