How to shrink the dangerous fat linked to heart disease and cancer in 12 weeks | Prof Jimmy Bell

There's a hidden fat that matters more for your health than your weight.  This is visceral fat: it wraps around your organs, raises your risk of heart disease and cancer, and builds up even in people who look slim and healthy. 

In today’s episode, Professor Jimmy Bell, a world-leading expert in measuring visceral fat, explains how we can shrink this dangerous belly fat in just 12 weeks.

Jimmy explores why two people can weigh exactly the same and carry completely different amounts of this hidden fat, what it is, where it hides and why it matters.

By the end, you'll have a completely new understanding of body fat, and what it really means for your long-term health.

If your weight has stayed exactly the same for years, what do you think is happening underneath it?

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Timecodes

00:00 Intro

02:47 The DEXA scan result that didn't match how thin he looked

09:46 Why your body composition can get worse even while your weight stays the same

11:47 What does it actually mean to be "skinny fat"?

14:06 The real reason some people end up "skinny fat"

15:58 Why people carrying more fat might actually be happier

18:10 How visceral fat sends inflammatory signals through your body

21:50 Why having almost no body fat can also make you unhealthy

25:19 Could a supermodel have more visceral fat than a sumo wrestler?

26:44 Why your body stores visceral fat around your organs on purpose

28:08 Why visceral fat is the first fat to disappear when you diet

29:22 How your diet directly reshapes the fat in your body

33:25 How long it actually takes to change your body fat

35:47 Does Ozempic actually get rid of visceral fat?

37:05 Why dieting alone can quietly cost you muscle

38:55 What does yo-yo dieting actually do to your body?

41:20 The pattern he sees again and again in long-term dieters

42:39 Why being thin is no guarantee you don't have visceral fat

44:07 Why diet alone won't get rid of visceral fat

45:24 The exact mechanism that makes exercise target visceral fat first

49:03 Why inflammation and visceral fat together wreck your metabolism

49:50 Why any amount of alcohol is bad news for visceral fat

51:32 How fast visceral fat can actually shrink (as little as 12 weeks)

54:14 Why menopause redistributes fat to your belly

57:20 Resistance training: the single best thing for visceral fat

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Mentioned in today's episode

Fat cell turnover in humans, Nature (2008)

New study investigates ‘optimal’ diets for healthy aging

Study of visceral, subcutaneous, liver and pancreas fat changes after 12 weeks, Diabetes Research and Clinical Practice (2023)

MRI assessment of adipose tissue fatty acid composition, Obesity (2024)

Phenotyping, Body Composition, and Precision Nutrition (2024)

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Episode transcripts are available here.