Because she prefers sweeteners perhaps?
If I drink coffee I have sweeteners because they don't have calories, well very few and sugar has a lot and I like my drinks sweet.
When someone can come on and give me proper peer supported proven evidence to prove that aspartame is the devil then I might listen. So far, no one has ever provided me with the evidence that wasn't built on scare mongering and bad science.
Of course it isn't going to be great for you, but dangerous? still waiting for proper evidence on that one.
And like I said, my teeth are fine. Not one filling here. I have been drinking it like this for 14 years.
The scaremongering on these threads gets a bit hysterical.
What does the evidence say about aspartame? A recent published review of all available evidence, including hundreds of studies, concluded:
The studies provide no evidence to support an association between aspartame and cancer in any tissue. The weight of existing evidence is that aspartame is safe at current levels of consumption as a nonnutritive sweetener.
Multiple reviews, going back to 1985, conclude the same thing. Since this latest review there have been more studies, in various countries (how big is this conspiracy?), showing no link between aspartame and brain cancer, and a lack of correlation between artificial sweeteners and gastric, pancreatic, and endometrial cancers.
Some effects, such as a dose-dependent effect on renal tumors, are specific to rats and do not translate to humans. Other studies are plagued by significant flaws, such as properly calculating doses (a big issue when trying to extrapolate doses from rats to humans). And still others show flat effects without a dose response curve, suggesting that a confounding factor, and not aspartame, is responsible for any observed increase in tumors.
By my reading, the current summary of available research is that consuming calories in drinks contributes to weight gain and obesity, substituting calorie-free drinks (whether water or diet drinks containing artificial sweeteners) does help reduce caloric intake and aid in weight control, but there is a tendency to overcompensate by increasing other caloric intake. Therefore it seems reasonable to use artificial sweeteners to reduce caloric intake from drinks, but to be careful to control overall caloric intake (so no, putting aspartame in your coffee does not mean you can eat the cheesecake).
www.sciencebasedmedicine.org/aspartame-truth-vs-fiction/