In simple terms, plasma lipoproteins are a type of fat-protein combination found in our bloodstream. They are responsible for transporting fats, including cholesterol, throughout the body. These lipoproteins come in different forms, such as LDL (low-density lipoprotein) and HDL (high-density lipoprotein), which are often referred to as "bad" and "good" cholesterol respectively. The levels of these lipoproteins in our blood can impact our heart health, as high levels of LDL can clog arteries and increase the risk of heart disease, while higher levels of HDL can help protect against heart problems.