Flax oil and Carb drinks-which ones?

Currently I am only taking Whey protein and creatine capsules. I have read flax oil and carb drinks are a necessity.
Why exactly are the fatty acids necessary?
Which brand is best bang for the buck?
What carb mixes taste/work/cost the best?
When is an ideal time to take the fatty acids and the carb drinks?

I am in a bulking cycle, however, I am trying to avoid as much fat gain as possible. I am mixing cardio in, but still eating like a horse. Thanks guys/gals!

I prefer flax oil. You can use various things to get EFA's. Various nuts(peanuts, walnuts, almonds, etc). Any carbs drink is fine that has maltodextrin. Real whole foods are much better.

You go with a casein (milk) based drink, try to keep sugars and saturated fats low, protein and fiber high.

The best EFA is Udo’s Oil.