You’re likely aware that sweating is how your body cools off , and that when you sweat, your body loses water, salt, and other minerals. What you might not know, though, is just how much you need to drink to replenish these fluid losses. People often don’t “drink as much fluid as they’re really supposed to,” says Dr. Cara Taubman, clinical director of emergency management at NYC Health + Hospitals in Harlem. “You really need to drink more fluids than you realize.”  Advertisement Advertisement