Plant Proof - Plant Based Nutrition & Inspirational Stories

In today’s episode Dr Matthew Nagra returns to The Proof to break down a new JAMA Internal Medicine study on butter, plant-based oils, and mortality. Over 200,000 Americans were followed for 33 years — so what did the research really find? We unpack the study’s most talked-about claims, including whether swapping just 10g of butter for plant-based oil could lower your risk of early death. Plus, we dive into the bigger picture: Why fats are so polarising, the debate around seed oils, and how to navigate nutrition science in an era of misinformation. Specifically, we cover: Inside a Controversial New Study on Butter and Plant Oils (00:00) How the 33-Year Nutrition Study Was Conducted (00:47) What Observational Studies Can (and Can’t) Tell Us (03:01) The Truth About Food Frequency Questionnaires (08:03) Surprising Patterns in Butter and Oil Consumption (17:52) Why One Common Oil Performed Better Than Expected (22:50) Are We Misunderstanding Nutrition Guidelines? (26:13) What Happens When Oils Are He