
Nuun
Sport Tablets
4 g of carbs in a 5 g (0.2 oz) serving.
- Carbs
- 4 g
- Serving
- 5 g0.2 oz
- Price
- $0.75 a serving
- RC Science Score
- 100out of 100
Nuun Sport Tablets has 4 g of carbs a serving and Science in Sport GO Hydro Electrolyte Tablets has 0 g. Here's how they compare on weight, cost, sodium and the label, and what your race looks like on each.

Nuun
4 g of carbs in a 5 g (0.2 oz) serving.

Science in Sport
0 g of carbs a serving.
numbers from each brand's label, verified by CarbRate
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Nuun Sport Tablets
Science in Sport GO Hydro Electrolyte Tablets
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| Sport Tablets | GO Hydro Electrolyte Tablets | |
|---|---|---|
| Carbohydrate | 4 g | 0 g |
| Serving weight | 5 g (0.2 oz) | not listed |
| Calories | 15 | 7 |
| Sodium | 300 mg | 345 mg |
| Potassium | 150 mg | not listed |
| Caffeine | 0 mg | 0 mg |
| Protein | not listed | not listed |
| Carbs from | not listed | not listed |
| Cost per serving | $0.75 | not listed |
| RC Science Score | 100 | 80 |
2 of 4 differ: vegan and gluten free.
Nuun Sport Tablets
Science in Sport GO Hydro Electrolyte Tablets
Set your carbs an hour and race length. Both options hit the same target.
| Sport Tablets | GO Hydro Electrolyte Tablets | Half each | |
|---|---|---|---|
| Electrolytes an hour | 15 | Infinity | 7.5 + Infinity |
| Electrolytes for the race | 60 | Infinity | 30 + Infinity |
| Sodium an hour | 4500 mg | Infinity mg | Infinity mg |
| 15 Sport Tablets an hour is more than most stomachs take. Move part of your carbs into a drink mix. Half each takes half your carbs from each. | |||
Your own carbs an hour depend on your body and goal time.
Build my free planThree electrolytes that each lead on one thing.

More carbs for the money
GU Energy Hydration Drink Tabs3 g of carbs · $0.67
Lightest to carry
Skratch Labs Clear Hydration Drink Mix1 g of carbs in 4 g (0.1 oz) · $1.65
Most carbs per serving
LMNT Recharge Electrolyte Drink Mix1 g of carbs in 6 g (0.2 oz) · $1.50CarbRate builds your fueling plan from the amount of glycogen you burn, your goal time, your course and the electrolytes you use.