Research Topic

Hey!
Soon, we are going to have to write a research paper answering a scientific question that we have; we are not to write about a medical device or how one works. For example, we cannot write a paper answering the question "how does a artificial heart work?" Within the first ten seconds of being told this assignment, I immediately thought of artificial sweeteners and their danger. The reason that this was the first topic that popped into my mind was because I am constantly told (almost every day, if not twice a day) that artificial sweeteners, such as Splenda, are bad for you. I really want to know what exactly is the danger involved with them and why this danger exists; I hate simply being told that is something is "bad" or "good" without an explanation. I will honestly admit to not bothering to take a few minutes and actually google this topic; I felt like it wasn't the most effective use of my time especially when I had hours upon hours of physics, math, and chemistry homework piling up. This is now the perfect opportunity to learn something new about artificial sweeteners, which I am very interested in learning about. So, as of today, my question for my research topic is (or something along the lines of):

"If artificial sweeteners are dangerous, what chemical components of them make them dangerous? Are certain artificial sweeteners more dangerous than others?"

Well that question/questions obviously needs a little bit of tweaking, but this is the direction that I am currently heading in terms of research paper topics :)