I have no idea whether the study you cite is legitimate or not. The chances are that, like so much of research today, the findings are meaningless.
I do know, however, that if the findings in this study were legit, anyone experiencing depression from aspartame would also experience depression from eating bananas. They would get really, really depressed from consuming a piece of grilled chicken with a cup of orange juice, or tomato juice, or orange juice, or red wine, because the same chemical compounds that make up aspartame are available here in significantly higher quantities.
Don't tell that to the fixed mentality folks, though, because they've already made up their minds, and something as simple as my example results in rabid denial and incessant snarking. But they're the ones employing the scientific method and critical thinking. Sure.
Yep. The tobacco industry scientifically proved that tobacco is harmless.
The manufacturers of aspartame have scientifically proved that aspartame is harmless.
You continue to assume that the only possible breakdown products of aspartame are phenylalanine, aspartic acid and methanol.
"Let's eat Grandma" is not the same as "Let's eat, Grandma"...