Germany: Marc Wubbenhorst, a German architect, drinks 20 litres of water per day to survive. He cannot sleep for more than two hours. The reason is that he suffers from diabetes insipidus, a condition in which one feels excessive thirst due to frequent urination.
According to an article published in doctor.NDTV, soon after drinking water, Wubbenhorst urinates because his body does not hold so much water. He does not sleep for more than two hours because he needs to rehydrate his body frequently to survive. Without enough water in his body, he faces problems in concentrating and soon gets a fever and loss of orientation.
Wubbenhorst is just 36-year-old but suffers from diabetes insipidus.
While frequent hydration for him to survive, it is also fatal for him. Drinking too much water fills the brain with water which is fatal in certain cases.