Key Takeaways

1. The general baseline recommendation is 0.5–1 oz of water per pound of body weight daily, which works out to 75–150 oz for a 150 lb adult.
2. Check your urine color to confirm proper hydration: pale straw yellow means you’re hydrated, while dark yellow or amber signals you need more water.
3. Add 12 oz of extra water for every 30 minutes of moderate exercise, and 16–24 oz for intense activity in hot weather.
4. Sip water steadily throughout the day instead of chugging large amounts at once to optimize absorption and avoid unnecessary fluid loss.
5. Pregnant people need an extra 10 oz of water daily, and breastfeeding people need an extra 32 oz to support fetal development and milk production.
6. Even mild dehydration (loss of just 1–2% of your body weight in fluid) can reduce cognitive function by 10–20% and cause persistent fatigue.
7. You can get 20–30% of your daily water from food sources like cucumbers, watermelon, celery, and oranges, not just drinks.