WASHINGTON, DC – FEBRUARY 9, 2026: Secretary of Health and Human Services, Robert F. Kennedy Jr., speaks at The Heritage Foundation. The conservative think tank held an event to celebrate one year of “Making America Healthy Again.” (Photo by Heather Diehl/Getty Images)
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The Health and Human Services Secretary, Robert F. Kennedy Jr., seems to be influencing American dietary and pharmaceutical preferences. Increased meat and protein consumption, rising vaccine hesitancy, and greater usage of certain HHS-backed treatments, alongside reduced intake of a medication the department cautions against, are indicators of this impact.
Despite Kennedy’s warning to not take medical advice from him, his communications suggest a desire to transform public health through personalized guidance, aligning with his Make America Healthy Again initiative. He aims to affect attitudes and behaviors around food and medicine choices.
The department’s mandate is to provide information to enhance the health and well-being of all Americans. Traditionally, this has included reminders for vaccinations and screenings, along with warnings about potentially unsafe foods.
Throughout his 14-month leadership, Kennedy has frequently challenged healthcare norms, often drawing criticism from health experts. His primary focus is on preventing and treating chronic diseases. While promoting exercise is beneficial, some of his messaging contradicts established medical evidence.
Since taking office in February last year, Kennedy’s leadership at HHS has been marked by controversy. Advocating for a return to rigorous scientific standards, his MAHA approach has sparked debate. He has revised dietary guidelines, disrupted clinical research, made unverified claims about pharmaceuticals, altered children’s vaccine schedules, and now threatens the United States Preventive Health Services Taskforce. Each of these actions diverges from established scientific consensus.
Meat and Protein
Kennedy’s strong support for a meat-centric diet may be influencing American meat consumption. The HHS released new dietary guidelines promoting foods like steak, fatty meats, and dairy. “We are ending the war on saturated fats,” Kennedy declared at a press conference, emphasizing the importance of whole, nutrient-rich foods like protein, dairy, and healthy fats, while decreasing processed foods. He concluded by stating that “this is how we Make America Healthy Again.”
There has been no clear reduction in ultra-processed food consumption; however, meat and protein intake have risen. More than 75% of U.S. consumers viewed red meat and poultry as part of a balanced diet last year, up from 64% in 2020. This shift appears to be part of a broader protein craze in America, potentially influenced by Kennedy.
The introduction of a revised food pyramid prioritizing protein and fats suggests plant-based foods are now secondary. While animal protein may benefit young individuals’ lean mass, plant foods can also provide necessary amino acids to achieve similar effects.
However, the health risks of consuming high levels of saturated fats, commonly found in red meat, are well-known. These fats can raise bad cholesterol levels, leading to hardened blood vessels and an increased risk of heart attacks or strokes.
Kennedy notably dismissed recommendations from an expert advisory committee that found benefits in replacing meat with other protein sources like legumes and tofu, which have little or no saturated fat.
Vaccines
Kennedy has had a complex relationship with vaccination, sometimes supporting it as a public health measure during crises, while simultaneously making statements or implementing changes that undermine it.
He has questioned longstanding childhood vaccine schedules established by the Centers for Disease Control and Prevention. Controversially, he has removed certain vaccines from CDC-recommended lists for specific sub-groups. The updated schedule now recommends delaying the hepatitis B vaccine and no longer universally supports vaccines for meningitis, hepatitis A, respiratory syncytial virus, rotavirus, COVID-19, and influenza.
Kennedy’s restructured vaccine panel, the Advisory Committee on Immunization Practices, advises against combining measles, mumps, and rubella vaccines for children under four, despite a lack of evidence indicating danger. Furthermore, ACIP, without supporting data, voted against recommending COVID-19 vaccines for certain adults, including pregnant women.
Kennedy has also linked childhood vaccines and their ingredients to autism. However, decades of medical and scientific consensus indicate no single cause, including vaccines, can be attributed to autism. Recent studies have shown aluminum ingredients in vaccines do not increase children’s health risks, confirming prior findings.
Notably, Kennedy’s vaccine-related decisions lack substantiating data. This includes his ban on thimerosal, a preservative with a small amount of ethylmercury, in multidose flu vaccine vials. Thimerosal was removed from all routine childhood vaccines 25 years ago, and only a small percentage of flu shots in multidose vials still contained it.
During Kennedy’s tenure, the CDC reported 2,288 measles cases in the U.S., the highest since 1991. Vaccine skepticism has become widespread according to a Politico poll, with a majority of Americans now concerned about vaccine safety, favoring a reduction in the number of vaccines administered.
Tylenol
Kennedy has incorrectly asserted that acetaminophen (Tylenol, or paracetamol outside the U.S.) is hazardous, especially for pregnant women. In a Senate hearing last week, he dismissed a new study refuting any autism link to acetaminophen as “garbage,” despite the lack of evidence supporting his claim.
Tylenol sales saw a 4% drop in 2025, with a sharper decline following Kennedy’s statements last fall. This may be due to negative media and political commentary falsely linking acetaminophen to autism, a connection that has been debunked numerous times.
Fluoridation
Kennedy has often claimed detrimental effects of water supply fluoridation on the brain. Yet, multiple studies, including a recent long-term investigation, show fluoride in drinking water has no effect on brain function. Fluoride is effective at preventing cavities by strengthening tooth enamel and reversing early decay.
Despite this, 17 states have proposed bills to eliminate water fluoridation in the past year.
Leucovorin
In September 2025, President Trump stated that relabeling leucovorin could offer “hope to the many parents with autistic children that it may be possible to improve their lives.” FDA commissioner Marty Makary echoed this sentiment, and Kennedy claimed it opened “the door to the first FDA-recognized treatment pathway” for autism spectrum disorder.
However, limited evidence exists for leucovorin’s benefits for autism. The drug is primarily used to counteract side effects of some cancer treatments. While the FDA expanded its label in March to cover a rare cerebral folate transport deficiency, it did not approve it for general autism symptoms, marking a retreat from previous endorsements.
Following the announcement, demand for leucovorin as an autism treatment surged, with a 71% increase for children aged 5 to 17 soon after a September 2025 news conference. This spike led to shortages late in 2025 and early 2026.
Hormone Replacement Therapies
Kennedy and other department officials have actively supported hormone-replacement therapies, such as estrogen for menopausal women and testosterone for men.
Manufacturers of HRT for women claim Kennedy’s recent actions have driven “significant” demand. However, evidence of the hormone’s effectiveness and associated risks highlights a complex narrative, necessitating personalized assessment. A similar narrative applies to testosterone use.
These examples underscore the power of messaging, particularly when delivered from a prominent platform. Kennedy’s extensive media presence, unlike his predecessors, amplifies his influence.
A note of caution is warranted, as the link between Kennedy’s health messaging and changes in food and pharmaceutical consumption does not definitively prove his influence. Correlation does not imply causation. Nevertheless, the behavioral changes observed are significant, especially when they conflict with established clinical evidence.
