Sorry I can't help you out. I have been using Splenda for as long as it has been on the market here and I use other things made with sucralose plus I use fructose and I have never had one headache from any of them.
I do know that some people seem to be more sensitive to things then others but I wouldn't put any kind of big generalization to things just because a few people experience side affects.
I tend to be suspicious of these "researches" done on the web. After all, there are a lot of people who write negative things about something just to insight paranoia. I'd be more inclined to talk to a doctor or nutritionalist on the issue and hear what they have to say. JMHO!
