Drink 8 Glasses of Water a Day
Does your body run best on 8 glasses of water a day? Not necessarily. Everyone has different fluid needs. The weather--both temperature and humidity--plays a part. So does your size, gender, and level of activity.
Sometimes this health claim is more specific. Some say 8 glasses of water helps with weight loss. That wasn't true of 38 overweight and obese teens though, who were asked by researchers to drink more water for six months. Others claim that drinking extra water beyond what you're thirsty for helps hydrate or smooth skin, reduces headaches, or helps flush more toxins from kidneys. These claims were carefully reviewed and found untrue: "There is no clear evidence of benefit from drinking increased amounts of water," the researchers concluded. Instead, drinking when thirsty is good enough for most people.
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