Personally, I find I crave sweets more when I use AS. I was on vacation recently and started drinking Diet Sprite and I wanted to cheat all the time!

I do remember years ago reading an article that indicated that SOME people do have an insulin reaction to AS, but since then all the reports I've read have said no.

I think it's a "your milage may vary" type of thing. If you think it's affecting you, avoid them.