1, it's aspartame
2, Mice aren't humans, and routinely, things that happen in mice do not happen in humans. It is not at all indicative of anything and can really only be used as a hint better than nothing for looking into similar effects in humans.
You don't need to change your diet, and you certainly don't need to replace it with sugar.
I'm all for shunning and making fun of reddit but this post is just kinda sad and pathetic. Have fun talking to a bot I guess.