A dietary product containing a fatty acid composition comprising one of (all-z omega-3)-5, 8, 11, 14, 17-eicosapentaenoic acid (EPA) in one of esterified form, ethylester form, free acid form, or any combinations thereof, and (all-z omega-3)-4,7, 10, 13, 16, 19-docosahexaenoic acid (DHA), in one of esterified form, ethylester form, free acid form, or any combinations thereof for non-medical treatment optionally prevention of obesity, an overweight condition optionally for supporting and controlling body weight reduction optionally for prevention of body weight gain, wherein the combination of EPA and DHA are present in the composition in an EPA: DHA ratio from 1:1 to 1:8.
