What you might not hear as much is that it’s not just water in — it’s water out. That’s why balance matters: Hydration is not just about water, but water and electrolytes working together. The truth is, some people need more, and some need less. Set a realistic baseline, monitor your urine, adjust as needed, and respect heat and activity-related limits. Proof that sometimes, the best hydration plan is the one you’ll stick with — even if it has a logo.