The Exam Room by the Physicians Committee The Power Foods Diet: Eat A Lot and Lose Weight | Dr. Jim Loomis and Caryn Dugan
Mar 19, 2026
Caryn Dugan, chef who creates practical plant-based recipes, and Dr. Jim Loomis, physician focused on evidence-based plant-predominant nutrition, explore eating more nutrient-dense, fiber-rich foods to support weight loss and disease prevention. They discuss building flavorful, doctor-approved meals, portion swaps like pasta plus veggies, whole grains, savory oats, plant-based burgers, and smart cooking techniques to make healthy eating sustainable.
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Whole Plant Foods Are Calorie Self-Limiting
- Whole plant foods are naturally calorie-light and calorically self-limiting because their fiber and water make large volumes feel filling.
- Jim Loomis contrasted 1,000 calories of Doritos (small volume) with 1,000 calories of broccoli or blueberries (many cups) to show how volume drives satiety.
Use Fiber To Trigger Fullness
- Aim to increase daily fiber toward 40–70 grams because fiber promotes fullness by slowing gastric emptying and activating GLP-1.
- Jim Loomis likened fiber's effect to Ozempic, emphasizing fiber-rich whole foods over low-fiber Western staples.
Shrink Carbs And Backfill With Veggies
- Make starchy carbs a smaller plate portion and backfill with beans, lentils, or vegetables to reduce calories while keeping satisfaction.
- Caryn Dugan recommends halving the pasta portion and filling the rest with zucchini noodles or veggies for the same mouthfeel.
