Abstract: The present invention provides a regulator for the amount of body fat containing a medium chain triglyceride, which can be used conveniently without any concern about the side effect and any restraint on the diet. 90% by mass or more of fatty acids constituting medium chain triglycerides are comprised of saturated fatty acids having 8 and 10 carbon atoms, the ratio by mass of the saturated fatty acids having 8 carbon atoms to the saturated fatty acids having 10 carbon atoms is 60:40 to 85:15, and the saturated fatty acids having 8 carbon atoms is present in an amount of 60 to 85% by mass of the total fatty acids bonded to the triglycerides at the 2-position. In addition, the present invention relates to a food product containing the above-mentioned regulator for the amount of body fat, which product is capable of regulating the body fat.