The ketogenic diet has actually been around for 90 years. It was first established to deal with patients with epilepsy, that responded well to the way it imitates a fasting state, while still enabling individuals to eat and obtain nutrients. The keto diet is very limiting, however, removing grains and particular fruits as well as veggies along with sugar-- which as a temporary diet so... https://www.everydayhealth.com/diet-nutrition/ketogenic-diet/steps-beginners-should-take-before-trying-keto-diet/