Lipoprotein lipase (LPL) is an enzyme playing an important role in lipid metabolism. Its purpose is to facilitate the transport of fatty acids inside the cells throughout your body, such as muscle, adipose, and heart tissue to name a few.
What does it do?
Say you eat a meal that has some fat in it. Once the fatty acids get into your intestines, they are packaged into chylomicrons (a lipoprotein) as triglycerides and they are transported to different parts of the body, such as: to the liver, to the cardiac tissue, to muscle tissue, to adipocytes, etc.
Before going further I would like to emphasize on the fact that I think there is not one single enzyme or hormone that should be considered decisive by itself, but that things should always be put into perspective so that the bigger picture is visible. I discuss about LPL, leptin, grehlin, insulin and other factors of this equation in the upcoming book (see the end of the article).