E284: The Science of How Food Both Nourishes and Harms Us

October 16, 2025

An avalanche of information besets us on what to eat. It comes from the news, from influencers of every ilk, from scientists, from government, and of course from the food companies. Super foods? Ultra-processed foods? How does one find a source of trust and make intelligent choices for both us as individuals and for the society as a whole.A new book helps in this quest, a book entitled Food Intelligence: the Science of How Food Both Nourishes and Harms Us. It is written by two highly credible and thoughtful people who join us today.Julia Belluz is a journalist and a contributing opinion writer for the New York Times. She reports on medicine, nutrition, and public health. She’s been a Knight Science Journalism Fellow at MIT and holds a master’s in science degree from the London School of Economics and Political Science. Dr. Kevin Hall trained as a physicist as best known for pioneering work on nutrition, including research he did as senior investigator and section chief at the National Institutes of Health. His work is highly regarded. He’s won awards from the NIH, from the American Society of Nutrition, the Obesity Society and the American Physiological Society.

Related podcasts: Addiction & Food | Food, Psychology & Neuroscience | History & Food | Obesity | Ultra-processed Food & Additives |

 

E281: Is ultra-processed food still food?

August 28, 2025

In this episode, Dr. Chris van Tulleken, a physician and professor from University College London, discusses the alarming reality of ultra-processed foods (UPFs) and their impact on our health. Van Tulleken details his own month-long experiment consuming UPFs, resulting in significant weight gain and various health issues. He explains the scientific definition of UPFs, their industry-driven design to enhance addictiveness, and the broader implications on public health. The conversation delves into the addiction potential of UPFs, their effect on brain chemistry, and the critical need for policy change to address these issues. Hosted by Kelly Brownell, this episode offers a thorough, eye-opening exploration of why we can’t stop eating food that isn’t really food.

Related podcasts: Addiction & Food | Childhood Obesity | Diet & Nutrition | Food Industry Behavior & Marketing | Food Policy | Food Safety & Food Defense | Food, Psychology & Neuroscience | Obesity | Ultra-processed Food & Additives |

 

E278: Here’s how screen time affects our kids’ eating, activity, and mental health

July 15, 2025

Parents, educators, public health experts, legal officials like State Attorneys General, and a surprisingly bipartisan collection of legislators have raised alarms and taken action to control the impact of digital media on children. There are a great many issues to be concerned about, one of which is food, nutrition, and health. Today’s guests are in a unique position to address this issue and help us think of a path forward. Dr. Amanda Staiano is associate professor in Pediatric Obesity and Health Behavior at the Pennington Biomedical Research Center, which is affiliated with Louisiana State University. Dr. Thomas Robinson is the Irving Schulman Endowed Professor in Child Health and professor of Pediatrics and of Medicine at the Stanford University Medical School. Dr. Staiano and Robinson have done groundbreaking work on children’s exposure to digital media.

Related podcasts: Addiction & Food | Child Development & Nutrition | Childhood Obesity | Food Industry Behavior & Marketing | Food Policy | Obesity | Screen time and Food | Ultra-processed Food & Additives |

 

E259: Your state of the science on weight loss drugs

January 8, 2025

About two years ago, we released a podcast with Dr. Thomas Wadden of the University of Pennsylvania describing work on a new generation of medications to treat diabetes and obesity. They were really taking the field by storm. Since then, much more is known since many additional studies have been published and so many people have been using the drugs. So many, in fact, the market value of the Danish company, Novo Nordisk, one of the two major companies selling the drugs, has gone up. It is now greater than the entire budget of the country of Denmark. This single company is responsible for about half of Denmark’s economic expansion this year. So, a lot of people are now taking the drugs and this is a great time for an update on the drugs. And we’re fortunate to have two of the world’s leading experts join us: Dr. Wadden, Professor of Psychology and Psychiatry at the University of Pennsylvania School of Medicine and the inaugural Albert J. Stunkard Professor of Psychiatry at Penn. Joining us as well as Dr. Robert Kushner, a physician and professor of medicine at Northwestern University and a pioneer in testing treatments for obesity.

Related podcasts: Diet & Nutrition | Food, Psychology & Neuroscience | Obesity | Weight Stigma |

 

E235: A successful interactive obesity treatment approach

April 22, 2024

Traditional clinical weight loss interventions can be costly, time consuming, and inaccessible to low-income populations and people without adequate health insurance. Today’s guest, Dr. Gary Bennett, has developed an Interactive Obesity Treatment Approach, or iOTA for short, that represents a real advance in this area. Dr. Bennett is Professor of Psychology and Neuroscience, Medicine and Global Health at Duke University, where he is also Dean of Trinity College of Arts and Sciences.

Related podcasts: Diet & Nutrition | Equity, Race & Food Justice | Obesity |

 

E207: World Health Organization’s Recommendations on Non-Sugar Sweeteners

June 28, 2023

Today’s podcast is a continuation of our series exploring the safety of non-sugar sweeteners in both food and beverages. In 2022, the World Health Organization conducted a systematic review of the most current scientific evidence on the health effects of non-sugar sweeteners. This analysis of 283 studies reveals that non-sugar sweeteners can impact health conditions such as cardiovascular disease, type 2 diabetes, adiposity, bladder cancer, and preterm birth. In 2023, the WHO released a guideline on the use of non-sugar sweeteners based on this 2022 review. Our guests today are Dr. Jason Montez, scientist with the World Health Organization, and technical lead on the systematic review and guideline. And, the director of the Department of Nutrition and Food Safety at the World Health Organization, Dr. Francesco Branca.

Related podcasts: Childhood Obesity | Diet & Nutrition | Food Policy | Food Safety & Food Defense | Microbiome | Obesity | Zero Calorie Sweeteners |

 

E196: Why do we need zero calorie sweeteners, and are they safe?

February 23, 2023

Artificial sweeteners, known more recently as non-nutritive or low-calorie sweeteners, have been a source of great hope. What could be better than enjoying sweetness in foods but without the calories? Sucralose, xylitol, stevia, saccharin, aspartame, there are a lot of them out there. You may add them to food yourself, you may consume them in beverages, and if not, there’s a good chance they’ll show up in foods that you buy. But, do they work and are they safe? Few know this area like Dr. Richard Mattes, distinguished Professor of Nutrition Science at Purdue University.

Related podcasts: Diet & Nutrition | Food Safety & Food Defense | Obesity | Zero Calorie Sweeteners |

 

E166: New Efforts to Combat Diabetes and Obesity Stigma in Clinical Settings

May 17, 2022

So there’s much talk these days about weight stigma, in fact, we recorded a number of podcasts ourselves on the topic, and I believe it’s very important, but this is our first podcast on another form of stigma. One that is powerful, often overlooked, and highly important to address. Our guests today are Matthew Garza and Nick Cuttriss. Matthew is Managing Editor at The diaTribe Foundation. And the dia in diaTribe derives from diabetes. The foundation’s mission is to, and I’m quoting here, “to improve the lives of people with diabetes, prediabetes, “and obesity, and to advocate for action.” I’ve served on an advisory board for diaTribe, and very much admire their work. Nicolas Cuttriss is a pediatric endocrinologist, and is founder of the ECHO Diabetes Action Network, and also has served on an advisory committee for the diaTribe Foundation. Matthew and Nick have been integral to a novel and welcome program on diabetes stigma that launched recently, that can be seen at the website, dstigmatize.org.

Related podcasts: Diet & Nutrition | Eating Disorders | Obesity | Weight Stigma |

 

E164: Highly Successful Weight Loss Drug Semaglutide Explained

May 3, 2022

Much attention has been paid recently in both scientific circles and in the media to a drug for weight loss newly approved by the FDA. A flurry of articles in the media hailed this drug as a breakthrough. This was prompted by the publication of a landmark article in the New England Journal of Medicine addressing the impact of this medication in a large clinical trial. Today’s guest is one of the authors of that paper. Another flurry of media attention occurred as the drug became available, with news that supply couldn’t keep up with demand. Dr. Thomas Wadden is the Albert J. Stunkard Professor and former Director of the Center for Weight and Eating Disorders at the University of Pennsylvania School of Medicine. He is one of the most highly regarded experts on treatments for obesity, having done some of the most important research on very low-calorie diets, a variety of medications, bariatric surgery, intervention in primary care settings, and more.

Related podcasts: Addiction & Food | Obesity | Weight Stigma |

 

E152: The Underrated Power of Self Talk and Self Care in Weight Loss and Wellness

January 13, 2022

Our guest today is Dr. Gary Foster, Chief Scientific Officer of WW, the company that many of us remember as Weight Watchers. Gary is one of the most respected scientists in the obesity field and is the author of a book released recently called “The Shift: 7 Powerful Mindset Changes for Lasting Weight Loss.”

Related podcasts: Addiction & Food | Childhood Obesity | Obesity | Weight Stigma |