Starvation/malnutrition -> gluconeogenesis, glycogenolysis, protein catabolism -> depletion of electrolytes (PO4, K+, Mg, Na), fats, protein, vitamins, salt/water intolerance -> refeeding (reintroduction of fluid, salt, nutrients) -> insulin secretion -> cellular uptake glucose, K+, Mg+, PO4 = reduced serum electrolytes, increased use of thiamine -> Na+ movement from ICF - ECF, increased ECV, fluid retention, oedema