Dehydration, or also known as extreme fluid loss, is very harmful for the body. A consequence of extreme fluid loss is dehydration. This can be caused by, for example travelers’ diarrhea and physical activities such as walking, cycling, mountain climbing, and other sports. Little children and elderly are in particular sensitive for dehydration. An O.R.S.-solution (Oral Rehydration Salts) can resolve the shortage of fluids and consequently also the sodium handling.