This is not news.
Here's a publication by Dr. Wilbur Olin Atwater, dd. 1915, titled "Principles of Nutrition and Nutritive Value of Food".
He advocated an affordable diet that focused on nutrient-rich foods and less sugar, fat and starchy foods.
https://archive.org/details/principlesofnutr00atwa/page/n3/mode/2up?view=theater