Actually, its true that they make you hungry.
I posted about it earlier but was shot down by Betty... I've recently followed up with the doctor who lectured on the subject and he expalined why her argument that they were safe for DIABETICS is true... but that they do, in fact, induce a feeling of hunger in healthy people.
I can't find the original post but here's a summary of what he said... paraphrased and somewhat simplified;
your body, while telling you that "hey, this drink is sweet" is also telling other parts "sugar is coming", so it releases substances that prepare you for absorption of said sugar, which includes lowering the amount of sugar floating around in your bloodstream.
When you drink diet soda, no actual sugars come over... but your body has already started preparing for them, so its blood sugar dips *slightly* below its happy level. This makes it tell you that "hey, I'd like some extra sugar" aka, making you feel slightly hungry.
In diabetics, the system that controls the above is totally out of whack... that's why they have diabetes. They are either unable to make or insensitive to Insulin... so the above doesn't happen (or doesn't induce anything, anyway).
Again, this is a *tiny* change, not the kind of surge you get after a meal to prevent hyperglycemia (which is what diabetics take drugs to prevent, since they can't regulate it themselves).
No, there's no study.
Yes, like people here have said, diet sodas can make you feel hungry... there is biochemical basis for it.
No, it probably isn't the difference between over-eating and eating right... but it might be an extra (tiny) urge you need to ignore.
In my personal opinion, we won't know how "safe" all the chem in diet sodas is for years to come, and the calories are preferable to all the extra headache of worrying if something in them will be retroactively linked to some weird cancer, etc 50yrs down the road.
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