Abstract: An antiobestic agent of the present invention having antiobestic effect, carbohydrase inhibitory effect, blood sugar increase inhibitory effect, monosaccharide absorption inhibitory effect, cholic acid adsorptive excretion promoting effect, cholesterol lowering effect, blood triglyceride lowering effect and lipase inhibitory effect and being useful not only as an antiobestic agent but also as an antilipotrophic agent, an antihyperlipemic agent, an antiarteriosclerotic agent and an antidiabetic agent. Tamarind seed coat extract containing a large amount of procyanidin, which is a trimer represented by the following formula and serves as the active ingredient in the present invention, exhibits a potent antiobestic effect as such without the need for further purification.

Abstract: A method of producing a capsaicin analogue, comprising reacting a fatty acid having 12 or more carbon atoms or an ester thereof (inclusive of fats and oils) with capsaicin in the presence of lipase to produce an N-vanillyl fatty acid amide having an acyl group containing 12 or more carbon atoms, and a method of producing fats and oils containing capsaicin analogues, comprising reacting edible fats and oils with capsaicin in the presence of lipase to produce N-vanillyl fatty acid amides from a portion of the edible fats and oils are provided. It is possible to produce non-pungent capsaicin analogues and other capsaicin analogues, which facilitates utilization of non-pungent capsaicin analogues in the food industry.