> The metabolic switch usually occurs between 12 and 36 hours after cessation of food consumption, depending on the liver glycogen content at the beginning of t

> The metabolic switch usually occurs between 12 and 36 hours after cessation of food consumption, depending on the liver glycogen content at the beginning of the fast, and on the amount of the individual's energy expenditure/exercise during the fast. I guess that since my breakfast time is around 8 am, then should stop food intake before 8 pm. The earlier the better. And some light exercise during that period, even better. Let’s do this!.