We cannot live without water. It is critical for proper body and brain function. It enables our blood to flow properly and help us stay energized. The good news: "Most people can handle mild amounts of 'dehidration,'" says Dna S. Simpler, MD, an internist in private practice. "The body regulates fluid balance through a number of complex pathways, including reduced urine production, increased reabsorption of water in the interestines and thirst — which prompts rehydration."

    Simpler is careful to point out the difference between being low on fluids and clinical dehydration. "Dehydration mainly occurs with illnesses such as fever, diarrhea and vomiting where excessive fluids are lost and not being replaced or in sport situation/ hot weather where excessive perspiration is not being replaced, " she explains.

    So how much water do you need? And what about that old stanby recommendation to drink eight 8-ounce glasses of water per day? "It is an oversimplification of what the body actually needs," says Simpler. "There is really no 'optimal' amount of hydration. "The weather, your diet and exercise habits are all a factor in how much water you need. Some days you will need more fluids, other days less.

    Those fluids can come from virtually any drink and even some foods. Milk, smoothies, and juice drinks count. Caffeinated bevarages, such as team coffe and energy drinks, count, too. Eating water-containing foods, incluiding tomatoes, cucumber, watermelon and oranges, is also a great way to up your fluid intake.

    All things considered, it makes sense to clue in to symptomps that can signal the need for more fluids. Here are a couple signs to pay attention to: you are thirsty (it may seem obvious, but a dry mouth and how thirsty you are do correlate to how hydrated you are), you are lighteaded or worn out (if you feel dizzy, you may be dehidrated), and your urine is extra dark (concentrated urine is a clear indicator that you are dehidrated. It means your urine has more waste in it).

(Diadaptasi dari http://www.safebee.com/health/7-sign-you-need-drink-water)

The passage can best summarized as ....