This invention relates to a method for treatment and prevention of obesity, anoverweight condition or for controlling body weight reduction, wherein aneffective amount of a fatty acid composition comprising at least one of (all-Zomega-3)-5,8,11,14,17-eicosapentaenoic acid (EPA) and (all-Z omega-3)-4,7,10,13,16,19-docosahexaenoic acid (DHA) or any combinations thereof, isadministered to a human or an animal. The present invention also relates touse of the fatty acid composition above for manufacture of a medicinal productfor controlling body weight reduction, and for treatment and prevention ofobesity or an overweight condition. Moreover, the present invention alsorelates to use of a fatty acid composition comprising at least one of EPA andDHA or any combinations thereof, for the manufacture of a food stuff or foodsupplement for controlling and supporting body weight reduction and forprevention of body weight gain. Additionally, the present invention alsoincludes a dietary product containing a fatty acid composition comprising atleast one of EPA and DHA or any combinations thereof, for non-medicaltreatment of obesity, an overweight condition and/or for supporting andcontrolling body weight reduction. Finally, the present invention relates to amethod for supplementing a dietary product with a fatty acid compositionmentioned above.
