There are 3 kinds of omega 3…ALA,EPA,DHA. Well EPA and DHA are technically metabolites of ALA, but for the sake of this discusssion lets assume these are three kinds. Taking ALA wont do much prevent or reduce the incidence of heart attacks and strokes, as only a very very tiny amount of it gets metabolised to EPA. Taking DHA doesnt do it either, as it wont prevent the formation of the heart unhealthy AA (to my knowledge).
DHA helps the brain not the heart!
That leaves EPA. ‘‘EPA’’ is the one among omega 3’s that can reduce heart disease not ALA and to my knowledge not even DHA. As it is the one that competes with omega 6’s for the same enzymes.
the consumption of EPA should be enough to do that!! Atleast half as much EPA as omega 6’s need to be consumed.
Also EPA only helps with regard to omega 6 consumption like i said above. But heart disease is also caused by other fats like trans, long-chain saturated and other non-fat things like cadmium and low HDL. EPA obviously doesnt help with these significantly as it doesnt compete with these for absorption or remedy these significantly enough to affect outcomes.
Any corrections to my points are welcome.
This is why fish oil pills doesnt always help, not because they are not effective. A bullet proof jacket doesnt help with death by stabbing, doesnt mean it is not effective for any attacks on your life.
Edit: One more thing. I have another theory as to why fish oil pills arent helping outcomes. Omega 3’s (all three of them ) are very susceptible to oxidation when exposed to heat and light… more than sat fat and mono are and probably more than even omega 6. Fish oil pills are often exposed to these in factories and stores/ homes. And when they oxidise their ‘health benefits’ reduce.