Nuun

Nuun Sport Electrolyte Tablets

Nuun Sport is a dissolvable electrolyte tablet designed to replace key minerals lost through sweat, offering a low-sugar alternative to traditional sports drinks.

### Overview

Nuun Sport is a dissolvable effervescent tablet that turns a standard water bottle into an electrolyte drink in about three minutes — no powder scoops, no sticky bottles. Each serving delivers five key electrolytes — sodium (300mg), potassium (150mg), magnesium (25mg), calcium (13mg), and chloride (40mg) — in a format designed for active use before, during, and after exercise. Products are certified gluten-free, kosher, and vegan, and are third-party tested, making it one of the more credentialed options in the crowded hydration tablet market.

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### Pros

- **Genuinely low sugar:** Unlike many competitors, Nuun tablets contain minimal carbohydrates, with just 1 gram of sugar per tablet — a meaningful advantage for anyone managing calorie intake or following a low-carb or keto diet who still needs electrolyte replenishment. - **Clean ingredient profile:** Nuun uses no artificial flavoring or sweeteners, relying on stevia for sweetness, and all products are third-party tested and Informed Choice certified — useful reassurance for competitive athletes subject to drug testing. - **Exceptional portability:** Each tube contains 10 individual tablet servings, and the slim, capped tube fits in a running vest pocket, carry-on bag, or desk drawer far more easily than bulky powder tubs or pre-mixed bottles. - **Strong value per serving:** A 10-tablet tube costs around $7.49, working out to roughly $0.75 per serving — significantly less than most ready-to-drink sports beverages.

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### Cons

- **Sodium may fall short for heavy sweaters:** Reviewers note that for serious rehydration, research suggests athletes need 300–600mg of sodium per hour during prolonged exercise — and at 300mg per tablet, one serving sits at the lower end of that range, meaning high-intensity endurance athletes may need to supplement further. - **Tablets can be fragile:** Tablets can crumble if the tube is tossed around unprotected in a gym bag, so some care is needed with storage. - **Not an energy source:** At only 15 calories per tablet, this product provides zero meaningful energy — it's purely a hydration tool, so athletes needing fuel alongside electrolytes will need to pair it with food or a separate carbohydrate source. - **Stevia taste sensitivity:** The stevia-based sweetness is noticeable and works well for most people, but those sensitive to stevia's aftertaste may find it off-putting — worth trying a single tube before committing to a multi-pack.

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### Who It's For

This product is well-suited to heavy sweaters who need electrolyte replacement beyond plain water, morning fasted trainers who want to replenish before a workout, and endurance athletes — runners and cyclists — who lose significant electrolytes over prolonged sessions. It's also a smart pick for frequent travelers who want a compact, TSA-friendly hydration solution that works with any water source.

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### Not Right For

Athletes doing high-intensity sessions lasting over 90 minutes who also need carbohydrates for fuel — this tablet replaces electrolytes only, and you'll need a separate energy source to avoid hitting the wall.

Key features

• Electrolyte tablets; low-sugar hydration; portable tube; good for running and travel

Seen at 7 retailers from $17.49 to $29.96 as of 2026-06-25. Prices change — check the retailer for the current price.

All the electrolytes, none of the syrupy sweetness — hydration that stays out of the way.