I just looked at the link for about a minute, scrolled to the bottom and could not find a non-authority-based reference. The references I saw seemed to be references to doctors, the FDA, and articles, but those are useless since they only provide opinions that can be open to bias. I would like to see some blind studies on this matter. Maybe some people have bad reactions to it, but I'm not even sure if this holds true, if so, is it any worse than other substance that had an allergic population? I personally do not like the link you posted because it lists at bunch of possible adverse reactions that almost anyone, whether aspartame user or not, may be experiencing. Plus, after skimming through the site, the site appears to be an extreme exaggeration. If someone showed me that a few years ago, I would think that aspartame is related to almost every disease known to man.