The Department of Agriculture has turned the familiar food pyramid upside down, significantly revising the dietary guidelines used by schools, federal nutrition programs, and millions of Americans.

In fact, the old food pyramid had been phased out in the early 2000s in favor of a dinner plate illustration. But the triangular illustration of a balanced diet, with carbohydrate-heavy breads and grains at the base, tapering to meats, dairy products, and saturated fats at the top, lingered in the public consciousness.

The new illustration, released on Jan. 7, more or less inverts the structure.

“These new guidelines are informed by the best and most reliable research on health and nutrition, particularly as it relates to the role of our diets in the prevalence of chronic disease in the country,” Health and Human Services Secretary Robert F. Kenney Jr. said while presenting the new dietary guidelines alongside Agriculture Secretary Brooke Rollins.

The familiar version of the old pyramid, dating to 1992, was criticized by experts for placing too much emphasis on carbohydrates and not enough on protein and healthy fats.

More recent versions of the illustration, which featured a dinner plate rather than a pyramid, continued to recommend that carbohydrates fill half of the plate.

“These guidelines replace corporate-driven assumptions with common sense goals and gold-standard scientific integrity,” Rollins said, predicting that they will revolutionize the nation’s food culture.

Previous versions of the guide clearly included advice to limit the intake of foods with added sugar. But advice to avoid the use of added sugar was given only to those caring for infants and children.

The new guidelines are more direct: “Avoid sugar-sweetened beverages, such as sodas, fruit drinks, and energy drinks.”

And although some allowance is made for using sugar at mealtimes, it comes with a warning.

“While no amount of added sugars or non-nutritive sweeteners is recommended or considered part of a healthy or nutritious diet, one meal should contain no more than 10 grams of added sugars,” the guidelines state.

The new guidelines also make a stronger statement about alcohol consumption.

The previous version recommended limiting intake to two drinks per day for men and one drink a day for women.

The new version states, “Consume less alcohol for better overall health,” and it does not mention a safe amount.

Dr. Mehmet Oz, administrator of the Centers for Medicare and Medicaid Services, explained the rationale behind the change.

“The new framework centers on protein and healthy fats, vegetables, fruits, and whole grains,” Kennedy said, noting that proteins now appear at the wider end of the pyramid.

Dr. Marty Makary, commissioner of the Food and Drug Administration, said: “The old guidelines had such a low protein recommendation that we are increasing that by 50 percent to 100 percent. Kids need protein. The old protein guidelines were to prevent starvation and withering away. These new protein guidelines are designed for American kids to thrive, and they’re based on science, not on dogma.”

Makary said the rise in insulin resistance and whole-body inflammation afflicting children today stems from a “protein-poor, micro-nutrient poor, ultra-processed, refined carbohydrate diet.”

Although the new guide maintains the same recommended intake of saturated fats (10 percent of total calorie intake), it gives favorable mention to full-fat yogurt, whole milk, and cheese.

“You don’t need to tiptoe around fat and dairy. You don’t need to push low-fat milk to kids,” Makary said, adding that the focus is on getting more protein into the diet.

Healthy fats, including cheese, milk, and olive oil, appear near the wider end of the new food pyramid.

“Federal policy promoted and subsidized highly processed foods and refined carbohydrates and turned a blind eye to the disastrous consequences today,” Kennedy said, asserting that this was done to “protect corporate profit taking.”

“The new guidelines recognize that whole, nutrient-dense food is the most effective path to better health and lower health care costs.”

Some critics, however, read the new guidelines as a gift to other industrial interests.

“If federal nutrition guidance is going to promote higher consumption of animal-sourced foods, it has a responsibility to state clearly that those foods must be produced under organic and chemical-free standards,” Elizabeth Kucinich, an organic food advocate, said.

“When these guidelines are followed, Americans will be saving themselves thousands of dollars. A healthier America will lead to a more affordable America,” she said.

“The new dietary guidelines from the Trump administration will ensure federal dollars go to real food to improve public health and therefore save the American people their hard-earned cash over the course of their lives.”

Rollins said the government is currently working on making unprocessed healthy food more accessible to all Americans, including those living in “food deserts.”

“Eating healthy for the most part—we’ve got 100 simulations—is actually less expensive. The challenge … is the access to those healthy foods, especially in parts of America where they have food deserts,” she said.

She said that one way the administration will try to solve that problem is by introducing stocking standards to the Supplemental Nutrition Assistance Program that will require retailers to double their stocking of healthier foods.