Fish oil supplement is not uniquely used in weight loss. There are studies that revealed how beneficial omega fatty acid supplements are to your physique goal. You can take a good omega 3, 6 or 9 blend that contains CLA as part of your daily supplement. CLA helps to reduce body fat and omega fats help to enhance your overall health. You should bear in mid that even though your primary short term goal may be fat loss, you should not ignore your overall health optimization.