Every time one if these stories pops up, I feel compelled to point out that artificial sweeteners have been tied to weight gain, so unless you are diabetic, there’s no reason to ingest them.

In general, they cause your metabolism to slow down, and make you feel hungrier. Giving them to mice on calorie restricted diets causes weight gain and lethargy in the mice.

Giving a subjectively identical amount of sugar to the mice (on top of the calorie restricted diet) causes less weight gain than the artificial sweeteners. (Because the mice stay active.)