"During prolonged fasting, hormonal and metabolic changes are aimed at preventing protein and muscle breakdown. Muscle and other tissues decrease their use of ketone bodies and use fatty acids as the main energy source. This results in an increase in blood levels of ketone bodies, stimulating the brain to switch from glucose to ketone bodies as its main energy source. The liver decreases its rate of gluconeogenesis, thus preserving muscle protein. During the period of prolonged starvation, several intracellular minerals become severely depleted. However, serum concentrations of these minerals (including phosphate) may remain normal. This is because these minerals are mainly in the intracellular compartment, which contracts during starvation. In addition, there is a reduction in renal excretion."
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Original Language: English
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Mehanna HM, Moledina J, Travis J (June 2008). "Refeeding syndrome: what it is, and how to prevent and treat it". BMJ. 336 (7659): 1495–8.
https://en.wikiquote.org/wiki/Starvation
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Starvation
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