Medium Chain Triglycerides or MCTs are defined as saturated fatty acids with 6-12 carbon atoms. Medium-chain triglycerides have a predominantly energetic function and thus represent an alternative and / or complementary metabolic pathway to the intake of sugars and starches, allowing a saving of glycogen, but also of amino acids in the muscle. Furthermore, compared to carbohydrates, medium-chain fatty acids provide a much higher energy intake. All these characteristics mean that MCTs are used in entral or parenteral nutrition in critical, terminal diseases or in conditions of rapid wasting (such as chronic pancreatic insufficiency). Equally important is the use of medium-chain fatty acids in sports as a supplementary energy source.