Manuel's Old Dear, I'm also pretty certain that the picture is further clouded by the way different people deal with different foods and their bodies metabolise fats, carbs, proteins differently.
This also, good point, yes.
I also think you'd have to drink a LOT of anything like diet coke for it to have a dramatic effect on your body and your weight.
I would have thought so also, but apparently it ain't so.
In the study I cited
http://www.wnho.net/artificially_sweetened_beverages.pdfthere was already a dramatic increase in weight gain/circumference gain in someone drinking 2 ASBs (artificially sweetened beverages) per day compared to someone drinking none. 2 per day pretty standard among those that are into such things.
2 x ASBs per day over several years = 2 x the weight gain and 2 x the circumference gain compared to a non-ASB consumer
5 x ASBs per day over several years = 5 x the weight gain and 5 x the circumference gain compared to a non-ASB consumer
(both correlations, but probably also causations)
Just 2? WTF man?
Well I'm thinking probably:
1) Artificial Sweeteners are really sweet, much sweeter than sugar. The sweet taste of them has been suggested as having a role in people putting on more weight than controls, possibly due to disruption in reward pathways etc (brain expects incoming calories/sugars from taste on tongue, gets none. They cited analogue studies on rats on Aspartamine)
2) Acid-formation.
Most people are already in a fairly over-acidic state (compared to the blood pH ideal), I think. Diet sodas are right up there near the worst acid-forming consumables. 2 of these a day are going to cause fairly high net system-acidity, with the subsequent body-compensation attempts, and with the subsequent metabolism disruption that the latter causes.
http://d.yimg.com/kq/groups/22755010/1681464815/name/Acid-base%2Bbalance%2Band%2Bweight%2Bgain%2B-%2BBerkmeyer%2B%2B2008%2BReview%2Barticle.pdf To answer Redgirl's question, I don't think there's too much to fear in having too many alkalines in your diet. The normal balance I heard cited is 80/20 alkaline-forming to acid-forming foods recommended. Most people are over-acid anyway, shifting to more alkaline going to just bring an equilibrium for the majority. I'm open to correction on that, it's what I saw on skimming.