The ketogenic or keto diet was established in the 1920s by Dr Russell Wilder at the Mayo Clinic. He recommended it to kids with serious epilepsy that weren't reacting to medicines, as well as discovered the diet minimised the regularity and severity of their seizures. Although, a current research has revealed not all children gain from the diet. https://www.nm.org/healthbeat/healthy-tips/nutrition/pros-and-cons-of-ketogenic-diet