MCT oil is a highly concentrated source of medium-chain triglycerides. It is completely natural and man-made via a process called fractionation. This involves extracting and isolating the MCTs from coconut or palm kernel oil.Food sources of MCTs include coconut oil, palm kernel oil, and dairy products. Yet, their MCT compositions vary. Also, MCT oil boasts large concentrations of certain MCTs. It often contains C8, C10, or a mix of the two. There are two main ways to increase your intake of MCTs – through whole food sources or supplements like MCT oil.