Dehydration is best prevented by

• A. Maintaining a low fluid intake
• B. Drinking a lot of caffeinated beverages
• C. Eating only solid foods
• D. Increasing fluid intake, especially water

Answer: (D)

Staying hydrated comes from regularly replacing the water your body loses, and water is the most efficient source for doing that. When you drink enough fluids, you maintain blood volume, support normal circulation, help regulate body temperature, and keep organs functioning well. Drinking more water—especially in hot weather or during physical activity—is the simplest, most reliable way to prevent dehydration.

Other options don’t meet hydration needs as effectively. A very low fluid intake means you aren’t replacing what you lose, so dehydration can develop quickly. While caffeinated beverages do count toward total fluid intake, they can have a mild diuretic effect and aren’t as dependable for preventing dehydration on their own. Relying on solid foods alone doesn’t provide enough liquid to maintain proper hydration.