| Nuun | LMNT | |
|---|---|---|
| Country of Origin | United States | United States |
| Founded | 2004 | 2019 |
| Format | Effervescent tablets (10 per tube) | Single-serve sachets |
| Where to Find | Rebel, endurance shops, Amazon AU | Higher sodium per serve than most |
Format
Nuun sells effervescent tablets in tubes of 10 - drop one into a 500 ml bottle. LMNT sells single-serve powder sachets - tear one open into water. Both are highly portable; Nuun's tubes are lighter for the volume of servings.
Sodium per Serve
This is where the products diverge most. Nuun Sport tablets carry around 300 mg sodium per tablet. LMNT carries 1,000 mg sodium per sachet - over three times as much. That's a deliberate positioning difference: Nuun is calibrated for general endurance and daily use, LMNT for heavy-sweat, hot-climate, low-carb, or fasted contexts.
Sweetener and Carbohydrate
Nuun Sport contains around 1 g of carbohydrate per tablet and is sweetened with stevia. LMNT contains no added sugar and is sweetened with stevia. Both are sugar-free. Neither is a fuelling product.
Where Each Fits
Nuun is the practical pick for general endurance, recovery, daily lighter hydration, and contexts where a 300-ish mg sodium dose suits. LMNT is the pick for very hot conditions, fasting protocols, low-carb diets where sodium intake is otherwise low, or heavy sweaters who feel underdone on lower-sodium products.
The Side-by-Side Takeaway
Format isn't really the question - both are easy to carry. Sodium load is. If you're not sure which fits, lean toward the lower-sodium option first and see how you feel. You can always add sodium; harder to take it back.
When to Reach for Each
Both products earn shelf space for genuine reasons. The summary below identifies fit rather than a winner - either is the right pick for the right reader.
Reach for Nuun when:
- Cycling and running kit lists wanting low-bulk tablets
- Moderate sweat conditions and general endurance
- Daily lighter hydration without high sodium
Reach for LMNT when:
- Heavy-sweat, hot-climate, or fasted-training contexts
- Low-carb / keto diets where dietary sodium is low
- Athletes who feel under-replaced by lighter formulations
Frequently Asked
Which has more sodium, Nuun or LMNT?
LMNT carries 1,000 mg sodium per sachet - over three times the sodium in a Nuun Sport tablet (around 300 mg). The two products are deliberately positioned for different use cases: Nuun for general endurance and daily use, LMNT for heavy-sweat, hot-climate, or low-carb contexts.
Is Nuun better than LMNT?
Neither is universally better - the better fit depends on your sweat rate and training context. Lighter sweaters in mild conditions are well-served by Nuun's moderate sodium dosing. Heavy sweaters in hot conditions or athletes on fasted/low-carb plans tend to benefit from LMNT's higher sodium dose.
Are both Nuun and LMNT sugar-free?
Both are functionally sugar-free. Nuun Sport tablets carry around 1 g of carbohydrate per tablet, sweetened with stevia. LMNT contains no added sugar and is also stevia-sweetened. Neither is a fuelling product - they're designed for the mineral component.
