Former FDA Chief Warns Human Biology Was ‘Never Meant’ to Handle Ultraprocessed Foods

Across the United States, concern about ultraprocessed foods is no longer limited to nutrition experts or advocacy groups. From politically active health reformers to everyday families navigating supermarket aisles, more consumers are questioning the long term consequences of products that arrive boxed, bagged, and ready to heat. These items, often engineered for convenience and flavor intensity, now account for a substantial share of daily calorie intake, especially among children.

At the center of this debate stands Dr. David Kessler, who once led the U.S. Food and Drug Administration during the 1990s. Known for confronting the tobacco industry over nicotine manipulation, Kessler now argues that the nation faces another large scale public health challenge. In his view, modern food formulations have created products that human metabolism was never designed to process efficiently.

Joining this conversation, though from a very different political position, is Robert F. Kennedy Jr., current Secretary of Health and Human Services. Despite disagreements on other health matters, both figures share a common concern, the regulatory framework that has allowed thousands of ingredients to enter the food supply with limited direct oversight.

The GRAS Loophole Under Scrutiny

The focal point of their criticism is a regulatory designation created in 1958 known as GRAS, meaning generally recognized as safe. This classification permits companies to determine the safety of certain ingredients without undergoing a full federal review, provided those substances are widely accepted by qualified experts. Over time, critics argue, this pathway has expanded far beyond its original intent.

Kessler and Kennedy contend that the GRAS system has opened the door to an unprecedented proliferation of additives, refined carbohydrates, and industrial derivatives. Estimates suggest that thousands of substances are now present in American packaged foods, a number far higher than in many European countries. The concern is not merely about quantity, but about cumulative biological impact.

According to Kessler, highly refined starches and sweeteners such as corn syrup and maltodextrin are absorbed rapidly by the body, triggering metabolic responses that contribute to obesity, fatty liver disease, and cardiovascular complications. These formulations, he argues, are designed to stimulate brain reward circuits, encouraging repeated consumption and undermining natural satiety signals.

Comparisons to the Tobacco Era

The former FDA commissioner draws a deliberate parallel between ultraprocessed foods and tobacco. While not everyone smoked, nearly everyone eats. That universal exposure, he suggests, magnifies the scale of potential harm. Rising rates of type 2 diabetes, hypertension, and other chronic conditions have coincided with decades of increased reliance on inexpensive, calorie-dense products.

In December, San Francisco City Attorney David Chiu filed a lawsuit against several major manufacturers, alleging that certain companies engineered and marketed products in ways that concealed health risks. Industry groups, including the Consumer Brands Association, reject these claims, maintaining that there is no universally agreed scientific definition of ultraprocessed foods and that manufacturers comply with existing safety standards.

Food writer Michael Pollan has also weighed in, emphasizing that many items marketed as wholesome, including granola bars and snack products, may qualify as ultraprocessed due to their extensive ingredient lists and industrial refinement. He links their widespread availability to agricultural policies that prioritize commodity crops such as corn and soy, key raw materials in processed food production.

Policy, Affordability, and the Path Forward

Kennedy has pledged to reassess GRAS ingredients using what he describes as rigorous scientific evaluation. At the same time, his broader health positions have sparked debate about credibility among medical professionals. Kessler, despite disagreeing with him on other matters, has expressed willingness to support reforms aimed specifically at reducing diet related disease.

The broader policy challenge extends beyond regulation. Critics point out that many communities face limited access to fresh produce and whole foods, often relying on shelf stable options because of cost and availability. Any meaningful reform, they argue, must address affordability alongside ingredient transparency.

As discussions continue, one point remains clear, the debate over ultraprocessed foods is no longer confined to academic journals or niche advocacy circles. It has entered mainstream political discourse and public consciousness. Whether through regulatory revision, litigation, or consumer education, the outcome of this conversation may shape how Americans understand the relationship between convenience, industry innovation, and long term health.