Add a keto kick to your morning coffee or smoothie with Rapid Fire MCT Oil. Long popular with athletes as a source of quick energy, MCT (medium chain triglyceride) oil is now gaining recognition as a valuable nutrient because it fuels the production of ketone bodies that support healthy metabolism and thermogenesis. MCTs feature fatty acids C6, C8, C10 and C12 that can boost ketone levels in the body for a burst of energy.