LOL.

They seem to be complaining that the studies aren't very good; as though that is the same as keto not working.

I've read too many personal testimonies online that match my own experience: moods much better on low carb. People getting off their mood meds using low carb.

There's also the concept of "cerebral allergy." That a food won't break you out into hives, but instead triggers a spell of angry or depressed behavior. There's lots of parents who have seen their behavior-challenged kids greatly improved, even transformed, with whole food changes to their diets.