Martin, Sorry, I have no idea where to go to unearth research, but I do know that within the last year Nutrasweet is on my NO list....I don't go near it. For YEARS I swore by it! In listening to my body now, I stay far away from it. I use to drink diet drinks in great qualities. Now anything sugar free is not even considered edible. Heavy head, worsening symptoms (tremors, uncoordinated, fatigue +), headache, are just not worth it. Neurotoxin ?....sure is for me! KdG