Avoid Aspartame, my wife has a sensitivity to it and developed all the physical sytmptoms of type 2 Diabetes but her blood sugars were normal, after about six weeks of tests a friend of our told us about sensitivity to it, we cut it out of her diet replacing it with an alternative and after another couple of months everything returned to normal.
She had a reoccurrence a while ago and we found one of the drinks she was having had gone over to using it, we cut that out and she is ok again now.
Despite what HM govt and the USA say anything that puts Methanol and can't be that good for you. Aspartame has a reported 92 side effects many relating to Diabetes and MS.
However the alternatives aren't exactly saits either but personally I would rather use a Sucralose sweetner that an Apsartame one, so am very careful where we buy sweetened products.