A really clear study into the adverse effects of aspartame (artificial sweetener added to 'no sugar' diet drinks) has been carried out by a women at her home. She bred 108 rats and put 'NutraSweet' - a product containing aspartame directly into the water of half of the rats. The study lasted two and a half years. During this time 67% of the female rats and 21% of the male rats drinking the 'NutraSweet' water developed large tumors. The majority of the tumors developed on the mammary glands of the rats.
The results of this study are quite shocking considering that these sweeteners are looked on by many as a healthy alternative to sugar.