Atalanta, there is new concern about sweeteners:
But just as it seemed that the evidence was clear, this year some curious new research from Israel was published, suggesting that far from helping to prevent Type 2 diabetes, the artificial sweeteners aspartame, saccharin and sucralose might contribute to it. Healthy mice were given drinking water with one of these three sweeteners added to it. When they measured their blood glucose levels they found that the mice who had consumed sweeteners were showing glucose intolerance, something associated with Type 2 diabetes, while the mice which drank plain water or water containing ordinary sugar didn’t. The reason appeared to lie in the bacteria found in the gut; if they had consumed sweeteners their gut bacteria was changed.
This is a cut and paste from this webpage:
http://www.bbc.com/future/story/20150127-are-sweeteners-really-bad-for-us