“Drink 2 liters of water a day.” It is one of the most common pieces of hydration advice. We hear it from wellness blogs, fitness instructors, and healthcare practitioners alike. But does everyone really need the same amount? Achieving proper hydration is not a one-size-fits-all formula. While drinking 2 liters serves as a practical baseline for many people, your true daily fluid requirement depends on several individual factors. TopHealth is here to help you understand how your personal fluid needs work and why individual tracking is essential for your everyday health.