Hospitals across the United States are now required to serve food that meets the federal government’s new dietary guidelines, a mandate that Health Secretary Robert F. Kennedy Jr. says will heal the nation by returning to ancestral foods — but which has ignited a fierce debate over what truly constitutes a healthy diet.
At a press conference in March, Kennedy declared that hospitals must follow the Dietary Guidelines for Americans, 2025–2030 released in January by the Department of Health and Human Services (HHS). “We shouldn’t be giving … people who are sick Jell-O and Cheerios and rubber chicken and sugar drinks,” he said, calling his Make America Healthy Again platform the remedy for a population he describes as the sickest in the world.
The guidelines represent a significant reset of federal nutrition policy. Their core message urges Americans to “eat real food” — defined largely as red meat, eggs and full-fat dairy — while slashing ultra-processed foods and refined sugars. Kennedy, whose background is in environmental law rather than clinical medicine, argues that decades of low-fat, high-carbohydrate mandates failed to curb the obesity epidemic, and that restoring animal-based fats is essential for metabolic health. He told attendees at the 2026 Annual Meat Conference: “We are ending the war on protein.”
‘A recipe for an epidemic’ — conflicting science on animal vs plant-based diets
The mandate arrives at a time when a growing number of hospitals have spent recent years moving in the opposite direction, adopting plant-forward menus for patients. New York City’s largest municipal healthcare system, NYC Health + Hospitals, launched a “plant-based default” programme in 2022 that has now served more than 2.8 million such meals. In 2025 alone, 98 percent of patients who chose the plant-based options reported satisfaction.
But the HHS guidelines take a sharply different view. In its new guidance, the department issued a pointed warning for those following plant-based diets, noting a “need to monitor and address potential nutrient gaps through varied food choices, preparation methods and targeted supplementation.” Kennedy and his supporters argue that animal proteins are nutritionally superior because they provide a “complete chain of amino acids” in a single source, whereas the caloric gap left by meat reduction is often filled with what he calls “poisonous” ultra-processed carbohydrates.
Leading specialists in plant-based medicine strongly disagree. Dr. Michael Klaper, a physician and educator who has long advocated for whole-food, plant-based nutrition, describes the federal government’s renewed enthusiasm for animal proteins and fats as a “biological time bomb” for diseases including clogged arteries, type 2 diabetes, colon cancer and heart attacks. “Mother Nature doesn’t care if your food is political. Biology is not,” Klaper told The Independent. He warns that an increase in animal products is a “recipe for an epidemic” of chronic illness.
Dr. Caldwell Esselstyn, director of the Heart Disease Reversal Program at the Cleveland Clinic, champions the idea that the very diseases filling hospital beds are entirely preventable — and even reversible — through plant-based diets. According to Esselstyn, healing begins the moment a patient stops consuming the saturated fats and animal proteins that trigger “oxidation and inflammation” on the lining of their arteries. “Once you start eating plant-based, your blood pressure begins to fall and normalize,” he said. “Your diabetes begins to fall and normalize, and your cholesterol comes down.” He argues that the new federal guidelines ignore this clinical reality.
Numerous studies have shown that predominantly plant-based diets are linked to lower rates of heart disease, type 2 diabetes and certain cancers, with benefits attributed to fibre, antioxidants and phytochemicals. Yet Kennedy and his allies counter that previous low-fat, high-carbohydrate advice failed — and that the nation’s chronic disease epidemic is rooted in faulty nutrition science.
The HHS insists that despite questioning entirely plant-based diets, it still supports a varied menu for hospitals. “These guidelines emphasize prioritizing nutrient-dense protein at each meal, including a range of animal and plant sources,” HHS Press Secretary Emily G. Hilliard said in a statement. The guidelines also removed numerical limits on alcohol intake, with Kennedy suggesting that alcohol can serve as a “social lubricant.”
For organisations such as the American College of Lifestyle Medicine (ACLM), the federal pivot does not change the underlying math of chronic disease. Jessica Jolly, senior director of practice advancement at the ACLM, argues that as payment models shift to reward patient outcomes rather than the volume of procedures, plant-predominant nutrition becomes “not just desirable, but inevitable.”
Hospital autonomy and the architecture of choice
The plant-based movement in hospitals is no longer confined to New York. Through a partnership with the non-profit Greener by Default, the food service giant Sodexo — which manages dining operations for thousands of healthcare facilities — recently hit its goal of implementing plant-based food programmes at 400 U.S. hospitals. Early data from one Sodexo hospital showed a 36 percent increase in plant-based entrée selection and a 20 percent decline in meat-based entrée selection. James Cantrill’s organisation, Greener by Default, helped NYC Health + Hospitals restructure its menus using behavioural science: making plant-based options appealing, abundant and the default choice, while still offering meat and dairy to any patient who requests it.
The approach has proven both financially and environmentally stable. In New York, the transition led to a 36 percent reduction in carbon emissions and cost savings of 59 cents per meal, totalling hundreds of thousands of dollars annually. Greener by Default is now navigating more traditional “meat and potatoes” regions, recently partnering with Health Care Without Harm to bring the model to three rural hospitals in the Midwest, where menus feature familiar staples such as savoury lentil-based meatloaf. The group is also moving internationally, working with the largest healthcare systems in British Columbia and the United Kingdom.
Despite the federal government’s shift, proponents of plant-based nutrition argue that the new guidelines do not spell the end for meat-free menus. Dr. Anna Herby, a nutrition education programme manager for the Physicians Committee for Responsible Medicine, notes that while the government is pushing for animal-heavy menus, the regulatory fine print has not fundamentally stripped hospitals of their clinical autonomy. She points out that the guidelines specify “minimally processed protein sources, including plant-based options.” To Herby, the “default” system used in New York remains a sustainable way to navigate this new federal environment. “Historically, only a very small percentage of Americans follow the Dietary Guidelines,” she said. “I am confident that healthcare professionals working in the lifestyle medicine space will take into account the overwhelming body of evidence showing that a plant-based eating pattern is optimal for chronic disease prevention and reversal.”
