3. Metabolic slowdown
Metabolism Slowdown
Due to the lack of nutrients entering the body, metabolic rate also decreases in order to preserve energy resources. This slowdown is further influenced by the loss of muscle tissue. The whole process ensures that the energy produced by ketosis will be enough to sustain the body during fasting.
A longer life span is also commonly associated with a slower metabolism and a reduced calories intake. The exact effect of regular fasting on human longevity, though, remains to be proven.