Even chatgpt is a better doctor:

Refeeding syndrome is a dangerous shift in fluids and electrolytes that can happen when nutrition (like glucose, carbs, or even IV feeding) is reintroduced after prolonged starvation or severe malnutrition. • When the body gets food again, insulin rises and cells pull in phosphate, potassium, and magnesium, causing blood levels of these to drop dangerously. • This can lead to heart failure, arrhythmias, seizures, or even death if not managed carefully. • That’s why after long fasting, nutrition (including glucose IV) must be restarted slowly, with close monitoring and electrolyte replacement.

Would you like me to give you a simple step-by-step outline of how doctors usually prevent it?