How did mankind survive for 6,000 years before dietary experts?
Leading lives that were solitary, poor, nasty, brutish, and short.
Wait. Did you say “before” or “after”?
We now have record numbers of centenarians. That means these people who are one hundred years are older grew up in decades where nobody said much of anything concerning your diet except to try and make sure you ate three squares a day. Lots of eggs, bacon, butter, grease, and other fatty "unhealthy" foods. How did they make it this far if all those foods were killers?