I've noticed that a lot of people keep saying that we're poor converters of ALA to EPA and DHA, so we should get our omega 3s from meat and fish. The latter is true, but grass fed beef contains ALA, not EPA and DHA. ALA is the same fat in vegetable oils, which I do not think are part of our natural diet. I know that cultures who have lived on a high meat diet eat either pork fat, (which is heavy in arachidonic acid and monounsaturated fatty acids and maybe some linoleic acid, idk), fish (EPA and DHA), and dairy (basically purely saturated). Also, nuts are widely associated with improved health markers (devoid of omega 3, besides walnuts, but which have plenty of omega 6 to counteract any ALA).
I don't know of any cultures that live on a great deal of grass fed beef, which is probably the greatest source of ALA per calorie in hte human diet besides canola and flaxseed oil, which both seem extremely unnatural to me.
Is ALA an underrated NAD?