Have you ever eaten something because you felt it was good for you?
I have just chomped through a tin of John West kippers, a can of ASDA extra special mackerel with lemon slice, and a tin of Sainsbury's skinless and boneless sardines. All in the name of omega3. When I belch it is appalling and has frightened the cats away.
If you'd just gone to the fishmongers and bought a pair of kippers they'd have been a load better for you than all the processed stuff you say you've eaten.