When someone doesn't eat food, the effect might surprise you. That person will not die immediately, they might pass out and starve but you can go a long time with out eating, sometimes maybe a week! But that is what happens when you do not eat <em>food</em>, now if you do not drink water for a long time, you might actually die. Sometimes, you can't even spend a day without drinking water.
So, when you don't eat food you will not die, just starve. But when you don't drink water, you will die.
4) A dietician helps the patient get the amount of nutrients they need, they can also assist in healthy weight loss for a patient who’s prepping for surgical procedure