Unpacking the new dietary guidelines

The U.S. Department of Agriculture (USDA) first introduced its food pyramid in 1992. The pyramid offered visual guidance on the optimal number of servings of the different food groups. Bread, rice, pasta, and cereal were at the bottom, and fats, oils, and sweets were at the top. Fruit, vegetables, milk, yogurt, cheese, meat, eggs, and nuts were sandwiched in…