 [ Symptoms ] what causes stress among breast cancer patients [ Disease ] this is a great question webmd offers a fun quiz about water intake try it out to see how you score unfortunately there is no good scientific answer to your question the institute of medicine recommends men get 125 ounces of water daily from all sources that includes fruits vegetables and other sources women need slightly less than that the quiz linked above states the u s government is dietary guidelines for americans does not recommend purposeful drinking of water for hydration unless you routinely engage in vigorous physical activity or are exposed to heat stress so unless you are constipated or compete in triathlons you are probably getting enough water just by drinking normally and eating some fruits and vegetables hope this helps