Understanding Fractionated Coconut Oil Fractionated coconut oil, also known as MCT oil, is a type of coconut oil that has been refined to remove the long-chain fatty acids, leaving only the medium-chain fatty acids. This process results in an oil that is liquid at room temperature, odorless, and has a longer shelf life compared to other traditional coconut oils. Fractionated coconut oil has become increasingly popular in recent years and is used in a variety of applications, from cooking to cosmetics, due to its unique properties.