MCTs, or medium-chain triglycerides, are fat molecules (triglycerides) composed of medium-length fatty acids (as opposed to short or long chain fatty acids). The shorter length makes them quicker to digest than longer-chain fatty acids found in most other foods. Taking MCTs in the morning can help you eat less at other meals, helping to lower overall caloric intake. MCTs can also be converted into ketones, an alternative fuel source to glucose.