German architect Marc Wübbenhorst has to drink at least 20 liters of water a day or risk dying from dehydration. The 35-year-old suffers from the rare metabolic disease Diabetes insipidus, which causes intense thirst and the frequent excretion of large amounts of diluted urine. If Wübbenhorst stops drinking water, his body starts to dry out, and he can die of thirst in a matter of hours.
Constant thirst has been a part of Marc Wübbenhorst’s life for as long as he can remember. It’s nothing like the thirst a normal person experiences, because it doesn’t go away after drinking a glass or two of water. His body can’t hold any water, as his kidneys eliminate the fluids almost as fast as he ingests them. Marc can never ignore his thirst for more than an hour, because he starts to experience severe symptoms of dehydration, like cracked lips, dizziness and confusion. These are symptoms that most adults experience after two or three days of fluids deprivation.