
Science in Sport
GO Electrolyte Drink Mix
37 g of carbs in a 40 g (1.4 oz) serving, from fructose.
- Carbs
- 37 g
- Serving
- 40 g1.4 oz
- Price
- $1.25 a serving
- RC Science Score
- 36out of 100
Science in Sport GO Electrolyte Drink Mix has 37 g of carbs a serving and Tailwind Nutrition Rapid Hydration Drink Mix has 12 g. Here's how they compare on weight, cost, sodium and the label, and what your race looks like on each.

Science in Sport
37 g of carbs in a 40 g (1.4 oz) serving, from fructose.

Tailwind Nutrition
12 g of carbs in a 13 g (0.5 oz) serving, from cane sugar.
numbers from each brand's label, verified by CarbRate
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Science in Sport GO Electrolyte Drink Mix
Tailwind Nutrition Rapid Hydration Drink Mix
Not sure what matters for your race? Find my fuel asks 3 questions and matches you.
Longer bar is better for racing on every row. The lit side wins it.
| GO Electrolyte Drink Mix | Rapid Hydration Drink Mix | |
|---|---|---|
| Carbohydrate | 37 g | 12 g |
| Serving weight | 40 g (1.4 oz) | 13 g (0.5 oz) |
| Calories | 146 | 45 |
| Sodium | 194 mg | 320 mg |
| Potassium | 0 mg | 90 mg |
| Caffeine | 0 mg | 0 mg |
| Protein | 0 g | 0 g |
| Carbs from | fructose | cane sugar |
| Cost per serving | $1.25 | $1.20 |
| RC Science Score | 36 | 87 |
1 of 4 differ: gluten free.
Science in Sport GO Electrolyte Drink Mix
Tailwind Nutrition Rapid Hydration Drink Mix
Set your carbs an hour and race length. Both options hit the same target.
| GO Electrolyte Drink Mix | Rapid Hydration Drink Mix | Half each | |
|---|---|---|---|
| Electrolytes an hour | 1.6 | 5 | 0.8 + 2.5 |
| Electrolytes for the race | 7 | 20 | 4 + 10 |
| Weight to carry | 280 g 9.9 oz | 260 g 9.2 oz | 290 g 10.2 oz |
| Sodium an hour | 315 mg | 1600 mg | 957 mg |
| Cost for the race | $8.11 | $24.00 | $16.05 |
| 5 Rapid Hydration Drink Mix 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
Precision Fuel & Hydration PH 1000 Electrolyte Drink Mix16.5 g of carbs · $1.75
Most carbs per serving
Precision Fuel & Hydration PH 1500 Electrolyte Drink Mix15.4 g of carbs · $1.75CarbRate builds your fueling plan from the amount of glycogen you burn, your goal time, your course and the electrolytes you use.