My grandmum lived to over a 100 and she took a tablespoon of cod liver oil every morning in her later years - when she was getting up there over 80.
That was cod—now hard to find. I guess fish oil is just as good...?
From what I've read, with cod liver oil you might get too much of vitamin A to get enough of omega-3 and vitamin D.
Cod liver oil has a lot more Vitamin A in it (as well as D) than straight fish oil does. I take both, Cod liver oil in the winter for the extra vitamins and fish oil in the summer.
Carlsons has great liquid cod liver and fish oils that have NO bad taste and no fish burps. You could use them as salad dressing they’re so mild. They’re nitrogen packed in glass bottles, not cheap (about 28$ a bottle at vitacost.com, best price I’ve found) but really good stuff.
LQ
Both are good, I’ve heard Cod Liver oil is better. It’s readily available in the natural foods section of your grocery store.