Help me out...I’m a dummy. I take GABA pills in the morning for, well, my brain. These guys are saying GABA is BAD?
https://www.nature.com/articles/ncomms5159
This study appears to have found that beneficial bacteria help regulate GABA and these can be enhanced through a low carb diet.
I don't think this specific concern impacts people who aren't presently on a path toward Alzheimer's, starting with Mild Cognitive Impairment, at least with how this article scopes the work.
Do note this study did deep review of fecal samples and not blood, from what I read.