Lipoproteins are tiny particles in the blood that help transport fats, such as cholesterol and triglycerides, throughout the body. They are made up of lipids (fats) and proteins, which allow them to move through the watery environment of the bloodstream. There are different types of lipoproteins, including low-density lipoprotein (LDL), often referred to as "bad" cholesterol, and high-density lipoprotein (HDL), known as "good" cholesterol. These lipoproteins play a crucial role in maintaining heart health. High levels of LDL can lead to plaque buildup in the arteries, increasing the risk of heart disease and stroke. In contrast, HDL helps remove excess cholesterol from the bloodstream, reducing the risk of these conditions.