TMHS 870: Is Vegetable Oil Actually Good For You? - With Dr. Cate Shanahan
Feb 17, 2025
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In this enlightening discussion, Dr. Cate Shanahan, a family physician and New York Times bestselling author, tackles the controversial topic of processed seed oils. She highlights their dark history and links to modern diseases, revealing the dangers of oxidative stress associated with these fats. Dr. Shanahan critiques common misconceptions and the lack of regulatory oversight. The podcast also examines the hidden consequences of removing trans fats, urging a reevaluation of ultra-processed foods and promoting a return to whole, unrefined oils for better health.
The history and processing of seed oils reveal their detrimental health effects, including links to chronic diseases and oxidative stress.
Critiques of observational and controlled studies highlight the misleading narratives around seed oils and their health implications.
Listeners are encouraged to take control of their dietary choices and demand transparency from food manufacturers about oil processing.
Deep dives
The False Promise of Ultra-Processed Foods
The introduction of ultra-processed foods was initially seen as a breakthrough in convenience, with products like TV dinners and toaster pastries marketed as nutritious options that simplified meal preparation. However, decades of consumption have revealed these claims to be misleading and even dangerous, as many of these foods contribute to various health issues. The podcast highlights how marketing strategies and endorsements from government agencies have fueled the consumption of ingredients like seed oils while obscuring their detrimental effects on health. As a result, people are now facing the long-term consequences of adopting these products as staples in their diets.
The Dangerous Nature of Seed Oils
Recent discussions affirming the health benefits of ultra-processed vegetable oils contradict the substantial body of evidence highlighting their potential dangers. Studies indicate that the chemicals released when cooking with these oils can negatively impact human health, leading to serious conditions such as organ failure and cancer. One study even found that inhaling fumes from cooking these oils can cause DNA damage. The podcast underscores the need for consumers to critically assess these oils, especially given their prevalence in processed foods and the ongoing push from some experts to normalize their use.
The Mechanics of Ultra-Processing
Seed oils are exemplified as ultra-processed foods due to their extensive factory refinement, which strips away essential nutrients and introduces harmful toxins. The production process involves heating and chemical treatments that render the oils unstable, allowing for the development of toxic compounds. Unlike natural fats that provide nourishment, these highly refined oils contain no nutritional value and are laden with harmful byproducts. The podcast emphasizes that understanding how these oils are processed can help consumers recognize their detrimental role in the food supply.
Observational Evidence in Nutrition Science
The podcast discusses how observational studies around the impact of diet on health often reveal significant insights that randomized controlled trials may overlook. The case of the negative effects of canola oil on health is highlighted, with evidence suggesting it contributes to conditions like fatty liver disease. The limitations of certain studies that advocate for seed oils are also examined, showing how additional factors such as weight loss and exercise may confound the results. Such discussions illustrate the complexity of nutrition science and emphasize the importance of considering broader patterns when evaluating dietary recommendations.
The Call for Consumer Advocacy
Amidst the ongoing debate surrounding seed oils, the podcast encourages listeners to take agency over their dietary choices and diets. Given that influential figures are being appointed to roles in government and health organizations who have ties to the seed oil industry, the necessity for public scrutiny around nutrition policy becomes critical. The conversation reinforces the idea that consumers should demand transparency and accountability from food manufacturers and health authorities. Empowering oneself through knowledge about food processing and potential health impacts can lead to more informed dietary decisions.
There is a lot of conflicting advice in the nutrition space. For years, foods like eggs, coconut oil, and beef have long been both villainized and championed. And another controversial food, especially in recent years, is the category of processed seed oils like canola oil and soybean oil. On today’s show, you’re going to learn the dark truth about seed oils with Dr. Cate Shanahan. Dr. Cate Shanahan is a family physician, New York Times bestselling author, and the mother of the No Seed Oil movement. Today, she’s back on The Model Health Show for a thought-provoking discussion on the dangers of processed seed oils. You’re going to learn about the history of these fats, how they became deeply engrained in our food supply, their connection with modern diseases, and much more. You’re going to learn exactly why these oils are so dangerous, and we’re going to dive into some of the common deflection points and studies that promote seed oils – and what they’re overlooking. There’s truly no one else on the planet who has more knowledge and experience with this subject matter. I hope you enjoy this interview with Dr. Cate Shanahan!
In this episode you’ll discover:
The chemical reaction that occurs in the process of creating vegetable oil.
What oxidation is.
The connection between disease and oxidative stress.
How the toxins from seed oils can get into the air.
The history of cottonseed oil.
Why trans fats were removed from the food supply.
How the banning of trans fats affected our consumption of seed oils.
The amount of processed seed oils the average person consumes per year.
Why seed oils are the definition of ultra processed food.
What percentage of the average American’s diet is real food.
The three main ingredients that are causing health crises.
Why canola oil is a chemistry set.
How canola oil is processed.
Why seed oils are devoid of nutrients.
The truth about the omega 3 content in seed oils.
How authors of studies often manipulate the data.
The link between infertility and oxidative stress.
Items mentioned in this episode include:
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