As a subject matter expert in nutrition and hydration, I can provide you with an informed answer regarding the use of coffee for hydration.

While coffee does contain water and can technically contribute to your daily fluid intake, it is not the most effective or healthy choice for hydration. Coffee is a diuretic, which means it can increase urine production and potentially lead to dehydration if consumed in large quantities without adequate water intake. The caffeine in coffee stimulates the production of urine, which can cause the body to lose more water than it takes in.

Moreover, relying on coffee for hydration can lead to other issues. Caffeine can cause insomnia, anxiety, and increased heart rate, especially in sensitive individuals or when consumed in excess. It's also important to note that drinking coffee can interfere with the absorption of certain minerals, such as calcium and iron.

For proper hydration, it's best to consume water, which is the gold standard for maintaining hydration levels in the body. Water is readily absorbed and does not contain diuretic properties that could counteract the hydration process.

In conclusion, while you can technically hydrate with coffee, it is not the best option due to its diuretic nature and potential to cause other health issues. Water is the preferred choice for maintaining proper hydration.

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Juices and sports drinks are also hydrating -- you can lower the sugar content by diluting them with water. Coffee and tea also count in your tally. Many used to believe that they were dehydrating, but that myth has been debunked. The diuretic effect does not offset hydration.read more >>