how long does the human body go without eating
We can't live on air and sunshine alone. The human body needs food and water to survive. A human can go for more than three weeks without food (Mahatma Gandhi survived 21 days of complete starvation), but water is a different story. At least 60% of the adult body is made of it and every living cell in the body needs it to keep functioning.
Most people would likely die within 3 -4 days without drinking or eating anything, and rarely one would survive over a week. A 97 year old woman survived 8 days without drinking or eating anything under the rubble of her home after earthquake occurred in Iran in January 2004 (1).