Why We Can’t Lose Weight (and What to Do About It) | Former FDA Commissioner

Mark Hyman, MD Mark Hyman, MD Oct 01, 2025

Audio Brief

Show transcript
This episode explores America's metabolic health crisis, reframing obesity and chronic disease as a systemic failure driven by the food industry, not a lack of individual willpower. There are four key takeaways from this conversation. First, the metabolic health crisis is a man-made problem stemming directly from the industrial production of ultra-processed foods. Second, challenging the "Generally Recognized As Safe" status of processed carbohydrates is a key legal strategy for systemic change. Third, a successful public health movement requires shifting the cultural narrative from blaming individuals to holding the food industry accountable, similar to the anti-tobacco movement. Finally, while consumers are not solely at fault for a toxic food environment, personal action combined with systemic policy change is necessary to reclaim public health. The metabolic health crisis is directly linked to ultra-processed foods, which are fundamentally different from whole foods. These products are engineered from deconstructed commodity crops to be hyper-palatable and bypass natural satiety signals. This design leads to chronic overconsumption and weight gain. A major regulatory failure allowed these harmful ingredients into the food supply through the "Generally Recognized As Safe" or GRAS loophole. This allowed the food industry to self-certify new ingredients without rigorous FDA review. A new legal strategy, modeled on the anti-tobacco movement, aims to revoke the GRAS status of refined carbohydrates. Under existing law, the industry holds the burden of proving that an ingredient has an expert consensus of safety at its current levels of consumption. The central argument is that this consensus no longer exists for processed refined carbohydrates. This legal challenge seeks to create a regulatory hook for systemic change. The episode emphasizes that the obesity epidemic is not a personal failing but a direct result of a toxic food environment. Shifting public perception and accountability away from individuals towards the food industry is crucial for effective systemic change. This mirrors the successful strategy used to change the narrative around tobacco. While individual choices matter, consumers face a challenging food environment. Therefore, personal action must be combined with systemic support, policy changes, and holding the food industry accountable. This dual approach is essential for truly improving public health outcomes and addressing the crisis comprehensively. This holistic approach combines legal, cultural, and individual strategies to address America's ongoing metabolic health crisis.

Episode Overview

  • The episode explores America's metabolic health crisis, reframing obesity and chronic disease as a systemic failure driven by the food industry, not a lack of individual willpower.
  • It details how ultra-processed foods, made from deconstructed commodity crops, are engineered to be addictive and bypass the body's natural satiety signals, leading to overconsumption.
  • The conversation highlights a major regulatory failure, the "Generally Recognized As Safe" (GRAS) loophole, which allowed these harmful ingredients into the food supply without proper oversight.
  • A new legal strategy is presented, modeled on the successful anti-tobacco movement, which aims to revoke the GRAS status of refined carbohydrates to hold the food industry accountable.

Key Concepts

  • Systemic vs. Personal Failure: The obesity epidemic is attributed to a toxic food environment engineered by the food industry, shifting blame away from individual consumers.
  • Engineered Foods: Ultra-processed foods are described not as real food, but as novel substances created by chemically and physically altering commodity crops (corn, wheat, soy) to be hyper-palatable and rapidly absorbed.
  • Bypassing Satiety: These products are designed to be consumed quickly and lack the fiber and food matrix that signal fullness, which leads to chronic overconsumption and weight gain.
  • The GRAS Loophole: The discussion centers on the "Generally Recognized as Safe" (GRAS) status, a legal loophole that allowed the food industry to self-certify new ingredients as safe without rigorous FDA review, based on outdated and flawed science.
  • The Tobacco Playbook: The proposed solution is a public health and legal strategy modeled on the campaign against the tobacco industry, focusing on creating a "regulatory hook" and changing public perception of the product from desirable to harmful.
  • The Burden of Proof: Under the law, the industry—not the FDA—has the burden to prove that an ingredient has an "expert consensus" of safety at its current levels of consumption. The central argument is that this consensus no longer exists for processed refined carbohydrates.

Quotes

  • At 0:44 - "because the food industry wants to blame you. And that is as far from the biological truth as you could possibly get." - Dr. Hyman argues that obesity is not a personal failing but a direct result of the food system.
  • At 20:46 - "...you have one industry that makes billions of dollars that's causing the problem, and then you have another industry now that is making equal profits to reverse what the former industry is doing." - The speaker highlights the perverse economic incentives driving the chronic disease epidemic.
  • At 42:50 - "The existing law... requires that these substances be generally recognized as safe. There has to be an expert consensus... The FDA does not have the burden. The industry has the burden." - David Kessler explaining the legal foundation of the GRAS status and where the burden of proof lies.
  • At 49:04 - "What the petition does, I think, is it asks the question. It opens the door. And once you open the door and say, 'Hey, it's no longer GRAS,' there's no turning it back." - Kessler describing the petition as a catalyst that forces a conversation and creates a legal pathway for action.
  • At 65:24 - "It is not your fault... But the one thing you can decide to do is to do something about it. But then we have to give people help." - Kessler emphasizing that while individuals must act, they need systemic support and proper care to succeed in a toxic food environment.

Takeaways

  • The metabolic health crisis is a man-made problem stemming directly from the industrial production of ultra-processed foods, which are fundamentally different from whole foods.
  • The legal basis for the modern food environment is vulnerable; challenging the "Generally Recognized As Safe" (GRAS) status of processed carbohydrates is a key strategy for systemic change.
  • A successful public health movement requires shifting the cultural narrative from blaming individuals to holding the food industry accountable for its products, similar to what was done with tobacco.
  • While it is not the consumer's fault they are in a toxic food environment, personal action combined with systemic policy change is necessary to reclaim public health.