Most People Are Dehydrated Without Knowing By Dr. Harold Gunatillake Most people do not know to recognize when dehydration sets in and they go on with their normal work as usual. Some complain that they do not pass enough urine, or may feel not right without realizing that dehydration is the simplest cause. By definition dehydration means that one hasn’t got sufficient water in the body for its normal metabolic requirements. You lose water when you breathe out in the exhaled air. You will sweat when warm to cool your body. You need to pass urine to get rid of waste products like creatinine, urea and other detoxified breakdown products. You do pass a small amount of water in your faeces daily, and more when having loose motions. Seventy-five per cent of your body weight is due to water. Water is required within every cell of the body (intracellular) and ...