onarliog: GI is not a "scientific study", it is a number. The question is "Do low-GI foods help with weight loss?". The scientific answer is "NO". See reference [23] in the first article you linked for a study explaining exactly this.
It is a scientifically backed up study.
" Raatz, Susan K., et al. "Reduced glycemic index and glycemic load diets do not increase the effects of energy restriction on weight loss and insulin sensitivity in obese men and women." The Journal of Nutrition 135.10 (2005): 2387-2391."
>>"Obese subjects (n = 29) were randomly assigned to 1 of 3 diets providing 3138 kJ less than estimated energy needs: high glycemic index (HGI), low glycemic index (LGI), or high fat (HF)."
Which means, they were locked to the diets and
were not allowed to consume more if they desired. Thus this study is not realistic, because in reality the quickly absorbed spoon of sugar causes quick hunger that makes to grab something else to eat; where a plate of soup of the equivalent in calories will not cause any such effect because insulin wave will be very shallow and will overlap/synchronous with the time nutrients enter blood vessels.
onarliog: We are talking about weight loss and gain. You seem to be associating blood sugar levels with weight gain/loss, which is unrelated.
Of course they are related! High GI foods cause insulin shock, which:
a) rises appetite and easily makes one take more
b) causes additional absorption (calories) in digestion system if high GI food is consumed first
c) may easily cause diabetes if repeated, because of insulin wave effect
onarliog: Please read my previous post on spiking blood sugar. That's what a GI discussion is good for. GI or blood sugar level has nothing to do with weight gain or loss. High GI food will get you hungry faster, yes. But it will not get you fatter.
Eat 1000 calories of sugar a day, you'll be hungry, and you'll be losing weight.(1)
Eat 1000 calories of proteins(2), you'll not be as hungry, and you'll lose weight. Caloric deficit is the name of the game.
(1) You will not make it, because you'll end up in clinic:
Dinicolantonio, J. J.; O'Keefe, J. H.; Lucan, S. C. (2015). "Added fructose: A principal driver of type 2 diabetes mellitus and its consequences". Mayo Clinic Proceedings 90 (3): 372–81. doi:10.1016/j.mayocp.2014.12.019. PMID 25639270.
(2) I strongly oppose protein diet, because for prolonged run it will cause very dangerous health condition (protein poisoning)!
onarliog: Caloric deficit is the name of the game.
Caloric deficit AND absence of high glycemic food AND cardio+muscle mass building exercises is the name of the game.
Caloric reduction alone brings you no where as it will trigger body into conserving energy, with increased weight(!) and low motivation as outcome.
onarliog: And different food doesn't "burn different". They digest slower or faster, which affect blood sugar levels, and the feeling of hunger.
"It does not burn different. It burns different."
The effects stretch far outside of "feeling of hunger", the whole endocrine system goes crazy. The effect is very similar to artificial sweeteners (except for allergic reactions to sweeteners chemicals), it causes a variety of problems - because body expects food, but food is already consumed.
onarliog: Plus high GI food also has other advantages. Especially for a post-workout meal. That's why you'll see athletes eat spoonfuls of dextrose after resistance training. But that's a different discussion.
On diabetes: If you have a medical condition, this whole discussion should be ignored, that's something completely different. This is for healthy individuals, and I'm not a medical doctor.
Yes, its different discussion, because that is done to compensate for low sugar level after training, which is only relevant for individuals in top form. ;)
onarliog: BTW. GI is only meaningful when the food in question is eaten in isolation, and on a completely empty stomach, which never happens in practice. For instance, you eat rice with other food, and there will be other stuff you had during the day already in your system, which completely changes the speed of digestion. That's why GI is highly disputed for practical use.
I don't know what else to say, if I still couldn't make my point, then shame on me :) Anyway, I'll be away for a few days, so this is the end of the discussion for me. Cheers.
Of course this happens in practice! Basically - a regular menu in fast food: a burger with fries and coke! Or eating a salad and drinking just one beer afterwards already spoils (boosts) the dietary value. Its not disputed, its very well known... Its like pumping a truck with super plus gasoline. Of course you can ignore all that, if you work out like crazy and your endocrine system (engine) survives. ;)