In this way, a keto diet is essentially mimicking what happens to our bodies when we fast. The keto diet craze is the latest diet hype, but it isn’t a new diet. The ketogenic diet originated as a treatment for epilepsy in the 1920s.
A review of this form of eating suggests it may help decrease appetite, but how this actually happens needs to be studied further. Symptoms of the keto flu include headache, fatigue, dizziness, sleep problems, heart palpitations, cramps, and diarrhea. These side effects usually lessen and eventually resolve in about two weeks.