Therefore, caffeinated beverages including coffee and tea can contribute to total daily water intake. The data suggest that more than 180 mg of caffeine daily (about two cups of brewed coffee) may increase urination in the short-term in some people, but will not necessarily lead to dehydration. Although caffeine has long been thought to have a diuretic effect, potentially leading to dehydration, research does not fully support this.To prevent this, take alcohol with food and sips of water. Enjoying more than a couple of drinks within a short time can increase the risk of dehydration, especially if taken on an empty stomach. Without it, the body flushes out water more easily. Alcohol can suppress anti-diuretic hormone, a fluid-regulating hormone that signals the kidneys to reduce urination and reabsorb water back into the body.Smaller volumes of urine may indicate dehydration, especially if also darker in color. However, foods, medications, and vitamin supplements can also change urine color. Generally the color of urine darkens the more concentrated it is (meaning that it contains less water). The amount and color of urine can provide a rough estimate of adequate hydration.
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