I remember seeing an article maybe a couple of months ago that turned up a possible cause / mechanism that operates via the liver, IIRC. If I read it correctly

I remember seeing an article maybe a couple of months ago that turned up a possible cause / mechanism that operates via the liver, IIRC. If I read it correctly, this paper reports only a small average effect, just a small fraction of the difference between obesity and normal weight. But that is just an average effect, it might be that the artificial sweeteners have no effect on most but a large effect on a few.