I drank diet soda when that Aspartame first came out. I would go on my daily bicycle ride which was a 13 mile trip around the Ocean Drive to my house. I would take a rest and drink one soda. This caused me to get very dizzy and lightheaded and I could not figure out the cause. Then I read that the Aspartame changes to formaldehyde in your system if you drink it when you are working out and overheated. And we all know what formaldehyde is used for (frogs in jars and Angel Dust). As soon as I eliminated the Aspartame the dizzy spells disappeared.
Haven’t touched the stuff since the first year they brought it out.