2020-12-28 19:29 Blood lipids refer to a group of fatty substances present in blood, mainly including cholesterol and triglycerides. There are generally two forms of cholesterols circulating in bloodstream: low-density lipoprotein (LDL) and high-density lipoprotein (HDL). LDLs are rendered“bad”since they accumulate in vessels and may result in blockage. HDLs are rendered “good” since they help to reduce bad cholesterols in bloodstream. Triglycerides come from food and primarily serve as energy source. Abnormal lipid level in blood is always associated with a number of diseases, such as high blood pressure, coronary arteries, hypothyroidism, type 2 diabetes, obesity, pancreatitis, et al.