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The Science of Everything Podcast

Episode 153: Low Carb Diets

The Science of Everything Podcast

James Fodor

Social Sciences, Natural Sciences, Science

4.8819 Ratings

🗓️ 9 June 2025

⏱️ 74 minutes

🧾️ Download transcript

Summary

A review of the carbohydrate insulin model of obesity and the related proposal that low carbohydrate diets are superior to traditional low fat diets. I begin with a discussion of the theory behind the carbohydrate insulin model, and then assess its plausibility using relevant evidence from rodent studies, dietary studies, ahd controlled feeding experiments. I argue that the scientific evidence does not support the alleged benefits of low carb diets for weight loss in otherwise healthy adults. Recommended pre-listening is Episode 151: Diet and Nutrition, and Episode 152: Obesity, Diabetes, and Hypertension. If you enjoyed the podcast please consider supporting the show by making a PayPal donation or becoming a Patreon supporter. https://www.patreon.com/jamesfodor https://www.paypal.me/ScienceofEverything

Transcript

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0:00.0

Oh, wow, oh, oh, wow, oh, wow, oh, wow.

0:13.0

Oh, wow.

0:15.0

Oh, my. Hello, you're listening to the Science of Everything podcast, episode 153, low carb diets.

0:39.8

I'm your host, James Fodor.

0:42.0

So in this episode, we're going to conclude our three-episode arc looking at diet, nutrition, obesity and such.

0:49.0

And in doing so, we're going to discuss the evidence and research on the difference between low carb

0:56.6

versus low fat diets. Obviously there are a wide range of diets that people try to use to lose

1:03.4

weight or to maintain weight, but what we're going to do in this episode is focus on one of the

1:08.4

major contentions in the literature, which is essentially relating to the

1:12.2

macronutrient balance of an ideal weight loss diet. That is whether to go with the standard

1:17.8

recommendation of most health authorities around the world, which is to reduce fat and have

1:22.6

the large proportion of calories come from carbohydrates, or the alternative is to instead reduce carbohydrates

1:30.7

in the diet and have the large proportion of nutrients come in the form of fats and proteins.

1:35.4

So this is what I mean by a low carb diet. And the contrast, again, is usually the low fat diet.

1:41.8

So in this episode, we're going to discuss the theoretical basis of why people have

1:48.3

argued for the advantages of a low carb diet. So this is the carbohydrate insulin model of obesity.

1:54.0

And we're also going to talk about the ketogenic diet, which is a extreme form of low carb diet.

2:00.4

We're going to then discuss the evidence

2:01.9

for the carbohydrate insulin model and the advantages of low carb diet. So we're going to talk about

2:06.4

the evidence for physiological mechanisms and rodent studies and so forth. Then we're going to

2:11.8

move and look at dietary studies on humans. And we're also going to look at the specific claims

2:17.4

relating to the

...

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