The truth is you need water every day, since you lose it through urine and sweat and this has to be replaced. Your body knows when it needs water by making you thirsty. You can also tell by your urine. It should be a very light-yellow. If it is deep and dark yellow then you are probably not drinking enough water. Of course, if you are taking B-vitamins your urine will be a deep yellow.
Extra exercise or work calls for more water than normal. Also, as you age, you need to drink more water, since your thirst signal does not work as good. And, your body needs water to lubricate your joints, keep your skin hydrated, remove toxins from your body, aid in your circulation, and digestion, elimination and nutrient absorption.
