You should be in the Mens Health column with this question. There are a mountain of implications to this right down to the polictical side of it with Donald Rumsfeld flagshipping in with nutrisweet. I would not feed it to my infant children, however I will drink nutrisweet type from time to time. I recently found it interesting to see that you cant even but chewing gum that does not contain "phenylwhatever". And I am talking the regular kind not sugar free. So yes they are even adding it as a BOOSTER it seems. You really have to consider everything in moderation and a grain of salt. Artificial sweetners have seemed to fly on with a great amount of freedom and a free pass it seems. Sweetnlow for example, is a confirmed carcinogen yet remains on the market. Granted mild. However I dont like statistics as they are ofter ass-raped. The implications of the risks being acceptable given certain criteria are always involved. But its has made its way into everything. Think about it, You cant even buy a pack of freakin Juicyfruit without the crap in there.
If you want to experience the worst case scenario for artificial sweetners thats an easy one. Go get yourself some Cystal Light Pink lemonade mix, whip up a gallon and drink the whole gallon in a day, and maybe repeat once more. If you dont feel like someone has planted an axe in the top of your skull, you are the exception. Dont ask me why, but whatever is in crystal Light has to be the worst they could possibly do with the stuff....