People don’t necessarily follow official guidelines. I wouldn’t call the American diet low fat https://ourworldindata.org/grapher/daily-caloric-supply-derived-f

People don’t necessarily follow official guidelines. I wouldn’t call the American diet low fat https://ourworldindata.org/grapher/daily-caloric-supply-derived-from-carbohydrates-protein-and-fat https://ourworldindata.org/grapher/daily-caloric-supply-deri... . Also this doesn’t even take into account the type of carbs. The average American consumes 15 grams of fiber a day, which means they don’t eat enough fruits, vegetables, legumes, seeds and nuts. Also a lot happened during those 40 years, to pin it all on the food guidelines is a bit too simplistic IMO.