<human>:  Would a diet of ice eventually kill a person?
<bot>: Yes, a diet of ice would eventually kill a person. Humans can survive without water for four days. Ice can be melted into water, which consists of hydrogen and oxygen, using a simple cigarette lighter. Humans can survive without food for 30 to 40 days on average. Humans need carbohydrates, proteins, and fats that are contained in foods. Water does not contain fat, carbohydrates or protein.