Every few years, science shakes the foundations of what people thought they knew about staying healthy. One day, eggs are dietary villains, the next they’re protein-packed heroes. Coffee swings from being a vice to a verified life-extender.
Even salt and fat, those long-time enemies of the dinner plate, are getting re-evaluated. Now, a new wave of research is turning even more beloved health rules upside down—and these six guidelines are the perfect examples.
