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Bulletproof Radio

812 EpisodesProduced by Dave AspreyWebsite

Welcome to being Bulletproof, the State of High Performance where you take control and improve your biochemistry, your body, and your mind so they work in unison, helping you execute at levels far beyond what you’d expect, without burning out, getting sick, or just acting like a stressed-out a-hole.… read more

57:04

New Research Says Fasting Beats Cutting Calories – Leonie Heilbronn, Ph.D., with Dave Asprey : 781

In this episode of Bulletproof Radio, I’m joined by Australian researcher Leonie Heilbronn, Ph.D.. Her fasting research looks at the biological pathways that support reducing the risk of chronic diseases.

Leonie leads the Obesity and Metabolism group based within the Lifelong Health Theme at South Australian Health and Medical Research Institute at Adelaide University in Adelaide, Australia. Today, I have her on to talk about her studies on fasting, many of which show more specific results than what we’ve seen in this field before. She looks at intermittent fasting, time restricted eating, calorie restriction and more. 

In a particular study on women, Leoni says, “We did see that the intermittent fasting group lost a little bit more weight than the caloric restriction group, and they had better improvements in their health.” There were other positive results like reductions in diabetes and cardiovascular risk markers. 

Fasting isn’t one-size-fits-all, so I asked Leonie a lot of questions about her research, such as:

  • How does the food you eat during intermittent fasting affect the fast itself? 
  • What food works for some people and not others and how does that influence the effectiveness of your fast? 
  • How do intermittent fasting and caloric restriction compare? 
  • When should you eat your daily protein and carbs? 
  • Should you consume black coffee during your fast? 
  • How does time-restrictive eating affect your lifespan?


How do people respond in fasting studies? “For some people, it takes them a little while to get used to fasting and then some people just maybe never get used to it,” she says. 

How do people respond in time restrictive eating studies? “I think time restrictive eating is great because you don’t really have to change everything that you’re eating and you’re still going to have some really good effects,” she says. “But I think if you started to have bad behaviors because of time pressure, then you’re not going to see the improvement that we’d hope to see.”

Leonie breaks down her research in in simple terms, so no matter what your familiarity with fasting might be, you’ll find a fascinating entry point. 

Enjoy! And get more resources at https://blog.daveasprey.com/category/podcasts/

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