Article share of the day, for those interested in more of the "why" of overeating. Guyenet is a careful, methodical writer - despite the title, the article is more about food reward in general, rather than yet another carbohydrate argument: Is Refined Carbohydrate Addictive?Quote:One of the most pervasive ideas in the diet-health sphere, and to some extent even in the scientific literature, is that when you eat rapidly digesting carbohydrate, this causes an increase in blood glucose and insulin, followed by hypoglycemia (the "crash"). This low level of blood glucose then causes hunger and cravings. It's a simple, logical idea that has virtually no scientific support.
Hypoglycemia definitely causes hunger and food cravings (3). That isn't in question. The problem is that the level of hypoglycemia that causes hunger (below 51-65 mg/dL depending on the study; 3, 3B) is rare in non-diabetics, no matter what kind of carbohydrate they eat. For example, Dr. Ludwig's study reported that participants had an average fasting glucose of 88 mg/dL. This is a normal level of fasting glucose. At the lowest level of the HGI group's post-meal "crash", they had a blood glucose of 85 mg/dL-- a trivial 3 mg/dL below fasting, and nowhere near hypoglycemic. The LGI group had a blood glucose of 95 mg/dL, only 10 mg/dL higher than the HGI group. Could a difference in blood glucose this small account for measured differences in hunger? Probably not, given that previous studies have struggled to find satiating effects of much higher levels of blood glucose in humans.
The unfortunate reality is that there is no compelling evidence that blood glucose fluctuations within the normal range cause differences in hunger and food intake.
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Thanks for sharing this article. A little more science than I can tolerate and it impresses me that we have scientists that enjoy this stuff. I'm grateful for the science and the scientists that can put it into somewhat simplified terms for us eager dieters/WOEs. :)
05 syys 13 jäseneltä: Neptunebch
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One of the most helpful (IMO) takeaways from the article is the reminder that even though it's a high-GI food, potatoes are also one of the most satiating. Which is why nobody believes my wife when they ask her how she dropped about 80 lbs, and she tells them "lots of steak and potatoes."
05 syys 13 jäseneltä: Nimm
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