The national nutrition advisor speaks with Fox News Digital about the HHS' recent food pyramid flip, as health officials now prioritize meat and dairy over processed foods and whole grains.

The guidelines could feed into the booming interest in protein consumption in the U.S. Despite eating more protein than many other countries—especially meat—most Americans say they want to increase the amount of protein in their diets. Major food chains are heeding the call.

The new dietary guidelines call for prioritizing high-quality protein, healthy fats, fruits, vegetables and whole grains. Foods to avoid or limit are highly processed foods, refined carbohydrates and added sugars. The "food pyramid" has literally been turned upside down.

Nutrition and diet experts say red meat and full-fat dairy can be part of a heathy diet, but they also can be high in sodium and saturated fats.

Chains from Dunkin' to Subway are opening the year with protein-packed launches as the trend pushes deeper into everyday menus. Why it matters: Protein is having a restaurant menu moment — and it's getting bigger.