Chemical substances for, Chemical material and Chemical preparations, and natural elements, in particular Fatty acids, Short-chain fatty acids, medium-chain fatty acids, butyrate, caprylate, Propionates and Acetates [chemicals]; Chemical and organic compositions for use in the manufacture of food, beverages and nutritional supplements, in particular Fatty acids, Short-chain fatty acids, medium-chain fatty acids, butyrate, caprylate, Propionates and Acetates [chemicals]