You can take it any time of day — morning, afternoon, post-workout, or whenever you need a hydration boost. It's designed for everyday use, so there's no wrong time to drop a tablet in your water.

Nuun recommends up to 3 tablets per day. Many athletes use one in the morning, one mid-day, and one after training to maintain steady electrolyte levels throughout the day.

Nuun Sport is formulated with slightly higher sodium and a small amount of sugar to support hydration during and around workouts. Nuun Zero Sugar is designed for all-day, everyday hydration with zero grams of sugar — it's a great option for non-training hours, recovery days, or athletes watching their carb intake.

Absolutely. With zero sugar and only 4g of total carbs per serving (from the effervescent tablet itself), Nuun Zero Sugar fits easily into keto and low-carb nutrition plans.