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David Di Paolo, MD Responds:
David Di Paolo, MD, a radiologist at the University of Texas Health Center at Tyler and a health and fitness instructor, responds: It may come as some surprise, but caffeinated beverages (in moderation) do count toward daily fluid requirements. That's according to the 2004 Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. For years, consumers were cautioned that caffeinated drinks, such as coffee, tea, and cola, had a dehydrating effect on the body by causing more frequent urination. As it turns out, caffeine's diuretic effect tends to be temporary.
With regular consumption, the body will learn to adjust and hold on to the water these drinks supply. As for your body's total water requirements, including water from all beverage and food sources, let thirst be your guide. Most healthy adults get enough fluids to satisfy their hydration needs. If your body is well hydrated, your urine will be clear or pale to light yellow in color. Signs of dehydration may include dark yellow urine, infrequent urination, dry skin, light-headedness, and fatigue.
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David Di Paolo
MD
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