Could the sweetened drinks we're consuming be making us feel a little more anxious? A 2022 study looking at the effects of the artificial sweetener aspartame on mice suggests that it's a possibility that's worth investigating further.
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.
This is a study on a small number of mice using a measure of anxiety which does not directly map to humans. Using mice for a study like this is fine for a pilot study but this has not clinical significance and can be safely ignored by the scientific press as well as the public. When we see a long term study which is double blinded in humans with reasonable doses, good controls, and hopefully some sort of mechanism of action then we can pay attention. Until then, aspartame has been linked to everything under the sun and yet nothing has been shown to be meaningful yet. It is one of the most well studied substances in the human diet and it seems to be at the very least mostly fine. Worry about lead in your water before you worry about this.
In my research to find a substitute for mom's sugar intake, Stevia came down to being the safest and most reliable, albeit not the best flavor substitute, necessarily.
Ah, another one of the "we found something in mice and that totally means it happens in humans" pseudoscience studies. Though we can probably blame the press for making such claims that the studies do not, unless this is one of those studies made by the known pseudoscience "scientists" like Seneff.
When a sample of mice were given free access to water dosed with aspartame equivalent to 15 percent of the FDA's recommended maximum daily amount for humans, they generally displayed more anxious behavior in specially designed mood tests.
What's truly surprising is the effects could be seen in the animals' offspring, for up to two generations.
We know that when it's consumed, aspartame splits into aspartic acid, phenylalanine, and methanol, which can all affect the central nervous system. There have already been question marks over potentially adverse reactions to the sweetener in some people.
As bad as all the sugar substitutes taste I honestly don't get how they ever caught on, starting at saccharine and on down the line. Stevia, aspartame, just taste... wrong. Minimally refined cane sugar or honey are the only way to go.