While a “keto diet” focuses on what nutritional choices you can make to maintain a ketogenic state even while continuously eating, this diet isn’t necessary to get the benefits of ketogenesis. You simply need to be void of digestible calories to start using your own body fat as fuel. Someone could be eating a pure carbohydrate diet (although no one would recommend this) and still become ketogenic by fasting for eighteen-plus hours (check out the fasting section of this book in chapter 6 for more details on fasting).
