#601: Gallstones & Gallbladder Conditions: Impact of Diet – Angela Madden, PhD RD

In this episode of Sigma Nutrition Radio, host Danny Lennon welcomes Dr. Angela Madden, a clinical researcher in nutrition and dietetics from the University of Hertfordshire, to discuss the complex relationship between diet and gallbladder health, particularly focusing on gallstone formation and management. Dr. Madden, who led a 2024 Cochrane Review on dietary fat and gallstones, emphasizes the lack of high-quality evidence supporting low-fat diets for gallstone prevention or symptom management—despite their long-standing use in clinical practice. She explains that gallstones, primarily cholesterol-based, form when bile becomes stagnant in the gallbladder, and that regular gallbladder contractions—stimulated by food intake, not just fat—are crucial to preventing stone formation. The episode challenges the conventional wisdom of fat restriction, highlighting that cutting out fat may actually hinder gallbladder emptying and increase risk, while high refined carbohydrate intake may be more strongly linked to gallstone development. Instead, Dr. Madden advocates for a balanced, whole-foods diet, regular eating patterns, and healthy lifestyle habits like physical activity and adequate sleep as evidence-informed, holistic strategies. The discussion also addresses post-gallbladder removal care, noting that most people do not require lifelong dietary restrictions and can safely follow a healthy, balanced diet. Dr. Madden stresses the importance of patient-centered care, symptom tracking, and collaborative decision-making. She calls for more research, particularly randomized controlled trials, to test the impact of meal timing, fat intake, and lifestyle factors on gallbladder health. The episode concludes with a reflective note on the mental and emotional benefits of spending time outdoors, a practice Dr. Madden personally values. Overall, the episode provides a critical, evidence-based reassessment of dietary advice for gallbladder conditions, urging practitioners and listeners to move beyond outdated habits and embrace a more nuanced, science-driven approach.