Yo, you peeps need to shizzle my nizzle! Anywho, faller is correct. Fat is digested at a much slower rate than carbs, and the insulin spike from the meal will have come and gone by the time the fat reaches the bloodstream. No only that, but most fats are not the same as the fatty acids in your adipose tissue, your body has to break them completely down and use the excess calories to create new fat tissue. Carb calories are converted into adipose tissue just as easily fat calories, if you do not factor in the higher insulin levels associated with excesses carb intake, which actually makes the carbs more prone to be stored as body fat if taken in in excess during a meal.
To answer the original question. Only if you add it after cooking. Cooking n-3 fats can damage them, thus making them less useful.