Dietary guidelines have shifted dramatically: from fearing fat to fearing sugar, from margarine to olive oil. Research by Kearns documents how these changes reflect evolving science but also industry influence and policy inertia. The experts were certain then too. Today’s certainty may be tomorrow’s revision. What stayed consistent: eat vegetables, limit processed food, whole grains over refined.
This companion covers the major shifts, why they changed, and what this means for you. (4 min read)