Michael Greger: Flushing Calories with Fiber for Weight Loss

Key Takeaways

• Eat 14+ grams of extra fiber daily to lose ~4 pounds in 4 months (overweight individuals may lose triple that).
• Choose whole foods over fiber-depleted versions (e.g., apples instead of apple juice) to slow digestion and increase satiety.
• Prioritize viscous fiber sources like oats, beans, and apples – 5g can hold a quart of water, adding 6lb of zero-calorie fullness.
• High-fiber diets trap 10% more calories in stool – you absorb fewer calories even from junk food eaten with fiber.

Notable Quotes

“It’s not what we eat, but what we absorb. So we can lose more weight on a high-fiber diet, eating the exact same number of calories, because some of the calories get trapped and never make it into our system.”

Bottom Line

Boost fiber intake to at least 25g (women) or 38g (men) daily through whole plant foods to reduce calorie absorption by ~100 calories/day and promote sustainable weight loss.

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