In my opinion natutal source of Omega -such as grounded  flax seed for daily use 1 tsp is more useful than chemical substances. The latest findings confirm its usefulness also for diabetic persons to prevent diabetic retinopathy

Its better to take with omega 9 such olive oil  which give more protective and powerful to brain and CNS.

What you are looking for taking omega 3 is to compensate the w3/w6 ratio in your ingesta that use to be lower than expected un occidental countries due to the excess in the ingesta of w6. Anyway you need both in your diet 

According to me omega 3 containing oil such as flaxseed, mustard, olive oil etc should be consumed to maintain the ratio of omega 3 and omega 6 fatty acids as they help to maintain different important body function specially for eye health, reproductive health and CNS activity..

Dear Dr Jana

Thanks alot for your kind care and for your valuable reply. So it is better to use omega 3 alone not in mixture with other types of omega so as to maintain their body balance which is important both physiological and biochemically to our bodies. MANY THANKS FOR YOUR VALUABLE TIME AND EFFORT.

 Dear All Doctors who are caring about my question

Thanks a lot for your kind care and for all your valuable scientific nutritional knowledge about this important fish oil. 

Thanks for your highy appreciated care , your valuable time and your kind care.

With all my best wishes