Thanks for the resource! I've been looking through scientific studies recently trying to find some that are appropriate to show to my doctor, and this seems better than following the trail of crumbs left by other studies' references.
The problem that I have looking at "low carbohydrate diets" is two things that are usually true about these studies.
The first is that they typically compare calorie-restricted diets, so if there are normal diets in the study, they lose weight also, and that reduces the apparent benefits of LCHF. Keto done properly shouldn't be calorie-restricted, as well, except for intentional fasting or not eating because you're not hungry (which isn't a restriction, really)
The other is that Low carb isn't a very clear target, and sometimes the carb amount is too high for ketosis (since they aren't aiming for ketosis), and isn't always as beneficial as it could be.
The otherwise great A TO Z study doesn't list limiting carbs, but does use the Atkins diet, rather than Keto. Also the carbs crept up near the end of the study, which likely corresponds with the weight increase of that diet segment.