Use of a fatty acid composition comprising at least one of EPA and DHA or any combinations thereof

A method for supplementing a dietary product comprising:

• adding a fatty acid composition comprising at least one of (all-Z omega-3)5,8,11,14,17-eicosapentaenoic acid (EPA), or derivatives thereof, and (all-Z omega-3)4,7,10,13,16,19-docosahexaenoic acid (DHA), or derivatives thereof, or any combinations thereof, to supplement the dietary product for at least one of prevention of body weight gain and controlling and supporting weight reduction in a human, wherein the weight ratio of EPA:DHA in the fatty add composition is 1:X, where X is larger than 1;
• wherein the concentration of EPA ranges from 10% to 20% and the concentration of DHA ranges from 20% to 50%;
• wherein the human is an adult.

A method for at least one of treatment of obesity, prevention of obesity, treatment of an overweight condition, prevention of an overweight condition, controlling body weight reduction, and prevention of body weight gain, comprising:

• administering an effective amount of a fatty acid composition comprising at least one of (all-Z omega-3)-5,8,11,14,17-eicosapentaenoic acid (EPA), or derivatives thereof, and (all-Z omega-3)-4,7,10,13,16,19-docosahexaenoic acid (DHA), or derivatives thereof, or any combinations thereof, to at least one of a human and an animal, wherein the concentration of EPA ranges from 10% to 20% and the concentration of DHA ranges from 20% to 50% and the concentration of DHA is greater than the concentration of EPA;
• wherein the human is an adult.