Found you via web search for Aspartame to show a friend who had purchased a ‘health’ product containing Aspartame and acesulfame-K. The product is ‘Redoxon’ vitamin-C, from, wait for it, Roche Consumer Health.
Acesulfame-K is unknown to me and will remain so. My experiences (2) with Aspartame were involuntary and only identified after I nearly died both times. The headaches caused were of such severity that 2 grams aspirin were required each time to alleviate them. The tension in the muscles of my neck would otherwise have broken it! This stuff is seriously bad. I cannot understand the continued marketing of it. The people who make and manufacture are seriously insane. Please notify my report to any interested parties. Please do not worry about hiding my identity – I don’t care who knows what I think of this kind of misbehavior by the Megagreedies of this world. May they die in agony!