Funny question I know but, I've been looking into this recently as it appears I don't.
We don't have oily fish or all the various other things that have it and our bodies can't make it.
Seems a lack of it can cause all sorts of low grade symptoms that can be written off as something else.
I'm now starting on omega 3 pills but just wondering if this is a well known thing or if I'm just late to the party on this one?