Caproic Acid (C6), though an MCT is not included in commercial supplements generally owing to its unpleasant odor and bitter taste. It is the shortest of the MCTs and though it can be quickly converted into ketones, it can create stomach upsets easily which is the reason it is excluded from most MCT supplements. Another reason is the content of caproic acid in coconut oil ranges only between 0.2-0.5% which is considered negligible to provide any health benefit.