The present invention relates to an oil or fat composition containing the following components (A) and (B):(A) from 80 to 99.9 wt.% of a monoglyceride comprising 20 to 75 wt.% of docosahexaenoic acid (DHA) and 0.1 to 25 wt.% of icosapentaenoic acid (IPA), as the constituent fatty acids thereof, wherein the weight ratio of DHA/IPA being 2 or more and(B) from 0.1 to 20 wt.% of a diglyceride.The oil or fat compositions according to the present invention are excellent in processability, have a good flavor, and are excellent in PPAR activating effects and β oxidation activating effects so that they are beneficial as foods and animal feeds as well as pharmaceuticals for diabetes, hyperlipidemia and obesity.
