Quote:
Originally Posted by Mirrorball
If carbs are the main cause of obesity, the Kitavans would have been fat. They aren't, and this falsifies the carbohydrate hypothesis, unless I'm missing something.
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It doesn't falsify the "carbohydrate hypothesis"; it falsifies the strawman you've set up and named "carbohydrate hypothesis" in its place.
If there is no caloric surplus, you won't get fat on pure sugar, and you won't get fat on pure lard. But there is a lot more to health than "are you fat".
Now, lets turn this on its head a bit, in the presence of energy balance, or caloric surplus, what are the reactions in obese people? From what I can tell, when an obese, inactive person drinks a 32oz sugar/hfcs beverage, those carbohydrates hit the blood stream fast, muscle tissue provides almost no free storage, and so it goes straight into adipose tissue and the liver and is stored as fat; the person has just consumed enough "food energy" for the day, and is absolutely as hungry as they were just a few minutes before. When that same obese person, takes the same calories as mostly fat with water to drink, the digestion takes a long time, energy is trickled into the bloodstream slowly more akin to the actual rate of metabolism, and hunger is shut down for a significant portion of the day.
The carbohydrate hypothesis is that it "causes obesity" because, IN THE PRESENCE OF SURPLUS fast-carb foods, eating mostly carbs causes obese people to eat more calories than they burn.
Bottom line, the islanders were not in the presence of surplus food, nor surplus sugars; the indicated diet also indicates high physical activity throughout the day, further pushing energy balance in the islanders' favor. So. Not fat.
As to blood sugar and risk of diabetes, I can only offer my personal observations. I eat even a small serving of carbohydrate rich foods, even natural or paleo-approved, my blood glucose goes up and over typical normal ranges. I eat 5-10 times the calories of that carb snack but with less than 5g of carb... blood glucose doesn't even budge, and I'm satisfied for a long time. (i'm eating at energy balance, maintaining, so I no longer get freeby good numbers from being at a solid deficit)