Can somebody please summarize fruit's impact on insulin response?

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Doppel

Lifer
Feb 5, 2011
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I'm trying to identify foods that taste sweet without skyrocketing blood sugar levels. I was looking at fruit and was surprised to see that a lot of it, which is the sweetest natural food I can think of, has a pretty low GI. Strawberries are 37 or something like that, for example.

Fruit consists of fructose. Fructose has a pretty low GI also. So, then, my two questions:

1) Why does Watermelon appear to have a very high GI (72-75)? It's basically sweet juice so I can see why it would be high, but presumably it's full of fructose (lowish GI), so that's strange.

2) I love to binge on sweetness. I'm not alone in that; I'll chow down on many cookies, ice cream, chocolate all in one sitting (no, I'm not actually obese). This is glaringly unhealthy, though. I have stopped kidding myself in that. If I do such a thing with a bunch of fruit (e.g. half a watermelon--which I can easily eat, and some other fruit on top) is it thus reasonable to think my insulin response will be substantially muted from the processed-sugar binge? I know the first scenario is just begging for diabeetus, but what about the second?
 

Doppel

Lifer
Feb 5, 2011
13,306
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I don't actually know
FTFY

Already went on google, unless you think I pulled up the correct GI values for the foods I mentioned out of thin air, which would be an impressive feat for somebody who is asking about it, wouldn't it?
 
Mar 22, 2002
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Watermelon has a higher glucose content. That's why it has higher GI.

In addition to that, fructose, which is low on the GI, has been shown in research to be the most detrimental portion of table sugar. In fruit, the amounts of fructose are low and the metabolism is delayed by the fiber and tannin content. Yes, you can eat some fruit. Binging, however, is still not in your best interest because the fructose content can still be detrimental (like if you tried to eat 10 servings of fruit per day).

Watermelon has a lower sugar density compared to the items you listed as well. But, like I said, binging with anything is silly. You need to address the control issues rather than trying to find a way out. Balance your diet.
 

AyashiKaibutsu

Diamond Member
Jan 24, 2004
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Heh, that'll be a warm day in hell :D

Until you decide to fix your bad habbits with conviction, you're always going to be stuck with the problems you face. Trying to come up dumb psuedoscience ways around it (binge on fruit...) is just going to prolong your problem.
 

Pantlegz

Diamond Member
Jun 6, 2007
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The GI numbers with fruit are probably effected most by how fibrous they are since fiber slows down the digestion and less sugar hits the blood stream at once. watermelon doesn't really have much fiber which is why it's got a higher GI that some other fruits.
 
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