Both of them are good, but they tend to turn rancid and have a short lifespan.
Bee is against flax seed oil, because it turns rancid. Well aspargus rot, yet they are good for your health. It is true however that sometimes even if you keep it in the fridge, it will turn rancid before you reach the bottom of the bottle: the taste is bitter and it is not good anymore.
Flax seed too can turn rancid and it is better to get the husk and to grind it yourself in a coffee grinder.
The oil of the flax seed (from the husk or the oil itself) assimilates better with proteins. So putting some in your daily yogurt with a bit of vanilla should do the trick.
If you are not allergic to oat, some in your morning oatmeal shall do it, with nutmeg and cinamon (natural antifungals).
Bee is right about vitamin A. I take flaxseed AND fish oil. Fishoil is an important antioxydant. I will keep taking it until I am over with this treatment.
Extra virgin oil is also very good. 1 teaspoon 1 to 3 times a day will help your body cleanse itself and get rid of bad fat, with this good fat income. Any EPA oil will do.
All of these oil supplement also help with bowel movements. We tend to constipate, in part for lack of good oil, and this is why it is helpful. However, if at some point your intestinal transit gets too rapid, slow down on the oil intake.