Sport Tablets
stevia-sweetened; +Caffeine variant sold separately
Texture: Capsule / tab · read from the label
How this product rates on the fueling evidence.
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Nuun Sport Tablets is an electrolyte with 300 mg of sodium and 150 mg of potassium per serving and 4 g of carbohydrate. It scores 100/100 on the CarbRate Science Score, which judges electrolyte products on sodium delivery, not on carbs. Pair it with a separate carbohydrate source.
Who Sport Tablets suits
Heavy sweaters, long hot races, and anyone whose shirt dries with white salt lines. 300 mg per serving is a meaningful replacement dose.
Runners fueling carbs from gels or chews who want electrolytes they can dose independently of energy.
How to use it in a race
Dose by sweat rate, not by the packet. Heavy sweaters in heat may need 500 to 1000 mg of sodium per hour, which at 300 mg per serving is 2 servings an hour as a middle estimate.
Take it with water, and take it on a schedule from the first hour rather than waiting for cramps or a headache. Sodium has no effect on cramping, but it does keep you drinking and keeps plasma volume up.
Servings per hour assume the 4 g per serving on the label. The finder sets your own g/hr target from race distance, sweat and gut.
Why it scores what it does
Computed from verified label data with the same evidence rules for every product. Retailer relationships play no part in the score.
300 mg sodium per serving — a meaningful electrolyte dose for heavy sweat loss.
Includes potassium (150 mg) alongside sodium.
Carb-light — a clean electrolyte source you can dose independently of your carbohydrate plan.
If this one works, try these next
Closest fueling profiles in the database (same format, carb sources, glucose:fructose and caffeine), with the one thing each does differently. Test two, not twenty.
How it went for runners like you
No reports yet. If you have raced or trained on this one, thirty seconds from you is the first data point for the next runner with your gut and your conditions.
Sport Tablets FAQ
How much sodium is in Nuun Sport Tablets?
300 mg per serving, plus 150 mg of potassium. Sodium is the electrolyte lost in the largest amount in sweat and the one worth replacing during a race.
Does Nuun Sport Tablets help with cramping?
No. Sodium and electrolytes have no effect on exercise cramping in controlled studies; cramping tracks with muscle fatigue and pace. Electrolytes are still worth taking for fluid balance in long hot races.
Can I use Nuun Sport Tablets as my only race fuel?
No. It carries only 4 g of carbohydrate per serving. Use it alongside gels, chews or a carbohydrate drink mix.
Why does Nuun Sport Tablets score 100/100?
Sodium delivery: 55/55. 300 mg sodium per serving, a meaningful electrolyte dose for heavy sweat loss. Full electrolyte profile: 20/20. Includes potassium (150 mg) alongside sodium. Purpose-built (carb-light): 25/25. Carb-light, a clean electrolyte source you can dose independently of your carbohydrate plan.
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