The Rule of Thumb
How much water a person consumes can have a significant effect on her weight. Being well-hydrated encourages weight loss because it suppresses thirst, which can be mistaken for hunger and lead to overeating. Drinking water regularly also helps to reduce fluid retention and bloating.
We all know the mantra: Drink eight 8-oz. glasses of water each day. Someone who is overweight, however, usually requires additional hydration. A good rule of thumb is an extra 8 oz. of water for every 25 lb. of excess weight. Increasing water intake gradually to reach the recommended daily amount is advised.
While an uptick in water consumption can benefit someone trying to lose weight, people with certain medical conditions or who take medication should be cautious. Drinking more water can have an unexpected effect on a medical condition or alter a medication's potency.
Drinking plenty of water can have a substantial effect on body processes that directly relate to weight loss. It should not be taken lightly, however. People managing a medical condition or taking medication should consult a doctor or other health care provider before making significant changes in their daily water intake.