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Of course not, without eating for two days can still live because to hold hunger humans can survive not eating up to 8 weeks with a note of still consuming water. But if the person's physical condition is good, then it can make someone last longer.
The body stores energy in the form of fat, carbohydrates and protein. Usually the body will use carbohydrate reserves first, then protein and finally use fat as energy intake. In addition to food reserves in the body, metabolism and climate also affect. People with a slow metabolism tend to have a feeling of fullness longer, because the body will adjust to the conditions that exist. Whereas if you are in a cold climate, your body will burn energy faster so it makes people feel hungry quickly.
in certain cases, as quoted from Howstuffworks, where a person has a bad body condition, it is likely that the person can only survive without food for 10 to 14 days. People who experience high levels of hunger are characterized by hallucinations, convulsions, irregular heartbeats and malfunctioning of certain organs. Whereas living without water is different from living without food. If the air is very hot and there is no water, then dehydration can occur within an hour. Therefore a person can die within a matter of hours if they do not have water and are in hot conditions. However, if the surrounding conditions are not too hot or cold, a person can survive without water for 3 to 5 days.
Humans desperately need water to survive, because every day people lose fluids through sweat, urine, feces even when breathing up to 1.5 liters per day. Water is very important for organs in the body to work properly. The main risk of people living without water and hot conditions is that body temperature will continue to rise and the person can experience a heat stroke. But if the person drinks water then it lowers the core temperature and can cool it. People who lose a lot of fluid will be characterized by dry mouth, sunken eyes, rapid heart beating, irritability, vomiting and diarrhea. The final stage of dehydration is the body experiencing shock which is characterized by blue-gray skin and cold to the touch. It turns out people are more able to survive without food than without water, because someone can last up to a few weeks if there is no food but if there is no water only lasts 5 days.