Aaron Carroll asks: Do we know anything about nutrition at all?
I got to thinking about it and maybe we knew everything about nutrition in 1960.
You need sufficient amounts of the 12 essential amino acids which almost all Americans get.
You need sufficient amounts of vitamins and minerals which almost all Americans get.
If you eat more calories that you burn you get fat.
And that all those newer findings; low fat, low carbs, more antioxidants, Mediterranean diet etc. are just spurious findings.