Fluid overload, CHF
Altered mental status
Seizure
Rhabdomyolysis
Hemolysis
Symptomatic from hypophosphatemia, hypokalemia, hypomagnesemia
Refeeding syndrome
Fluid overload
Starvation ketoacidosis
Insulin secretion
Diabetic ketoacidosis 
Loss of myocardium
Diabetic ketoacidosis
Na absorption