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Today on the show, Sam Feltham from Smash the Fat is going to tell you how he ate 5000 calories a day for 21 days and gained practically no weight and actually decreased measurements. Sam did this as an experiment to prove that calories-in, calories-out is an unhelpful model — something I’ve also been preaching pretty hard. But Sam has a cool experiment to prove it and I don’t, which is why I wanted to bring him on the show. This is a fun one, so sit back and enjoy the ride!

Mentioned on the Show

 

If you have any comments on this episode, please use the comments section below.

Comments

  • TheGardenWeasel says:

    I enjoyed the podcast. It makes me wonder about the following:

    1) What about someone who is metabolically compromised/broken eating a high-fat diet?

    Would we necessarily expect the same results? Also, is it really a good idea to recommend that *everyone* consume a high-fat diet? Or, a low-carb diet, for that matter? Clearly, there have been populations that have been healthy on a variety of diets. I’m not sure I see the need to give the matter too much more thought, lest I simply wish to find some support for a pet theory.

    2) Aside from scale weight, the experiment tells us nothing about what’s really important: Health.

    What concerns me about those following the current trend of high fat diets (ketogenic or otherwise) is what’s happening in the liver. As a layperson with minimal understanding, I have heard Lipidologist Thomas A. Dayspring, M.D. explain that too much fat consumption may cause a rise in LDL Particle Number (LDL-P) — the most important predictor of a cardiac event. If I recall correctly, in some people, the high saturated fat intake can increase the number of VLDL particles. Eventually, VLDL particles are converted into LDL particles. Too many VLDLs and you will end-up with too many LDLs. This increases the chances of having an LDL particle “crashing you artery wall,” according to Dr. Dayspring.

    Any thoughts on either item?

    Thanks for the opportunity to have a Disqussion. : )

    • Kevin Geary says:

      Hi, there are many articles on this blog and others that detail the science behind high fat diets. I dont’ have the space in a blog comment to lay it all out, though I can say:

      1). Metabolically broken people SHOULD eat a high (quality) fat diet to restore proper metabolic function and avoid high glycemic carbohydrate sources, especially processed and grain-based.

      2). The studies that link high fat consumption with bad cholesterol are typically not controlling for quality of food intake or other factors related to the diet. High fat is deadly if it’s the wrong kind of fat and/or mixed with processed/high glycemic/or grain based carbohydrates. The studies grossly lack context.

      • Robert says:

        Dear Kevin,

        Thank you for the prompt response. (Especially considering tonight’s webinar.) I’m new to your blog and podcast, so I will eventually catch-up.

        Regarding point #2, it was on Jimmy Moore’s podcast that I heard Dr. Dayspring talk about too much fat POSSIBLY causing a proliferation of VLDL, and, subsequently, LDL particles. I think quality fat was pretty much implicit, given the forum. But, you are certainly correct to make it a clear point.

        Speaking of Jimmy, it was his “nightmare” LDL-P number that lead Dr. Dayspring to suggest that Jimmy might wish to somewhat reduce his overall percentage of fat. Not outrageously low, but lower than 85% and keep retesting to see if LDL-P comes-down. I believe Jimmy is likely eating good saturated fats,

        Finally, in support of your comments, another suggestion Dr. Dayspring offered to reduce LDL-P: reduce carbohydrates!

        Thanks again for the courtesy of a reply. I look forward to tonights “Hack Your Sleep” webinar.

        Regards,
        Rob

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