Headaches from omega 3

[Enlightenment]

I get strong headaches from too much omega 3, but I can eat much more (but still not that much) omega 3 from fish like canned mackerel than fish oil supplements until I start to get headaches. I suspect that may have something to do with a form of fish oil I ingest 

Knowing that omega 3 has a lot of benefits, I would like to test all of these forms of fish oil to find the one I can eat the most of without getting headaches. Do you know which form of fish oil (from the video above) is in the canned mackerel and which one is most likely in the cheapest omega 3 supplements? 

Edited December 19, 2021 by Enlightenment