
GU Energy
Hydration Drink Tabs
3 g of carbs a serving, from cane sugar.
- Carbs
- 3 g
- Price
- $0.67 a serving
- RC Science Score
- 100out of 100
GU Energy Hydration Drink Tabs has 3 g of carbs a serving and Skratch Labs Clear Hydration Drink Mix has 1 g. Here's how they compare on weight, cost, sodium and the label, and what your race looks like on each.

GU Energy
3 g of carbs a serving, from cane sugar.

Skratch Labs
1 g of carbs in a 4 g (0.1 oz) serving.
numbers from each brand's label, verified by CarbRate
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GU Energy Hydration Drink Tabs
Skratch Labs Clear Hydration Drink Mix
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| Hydration Drink Tabs | Clear Hydration Drink Mix | |
|---|---|---|
| Carbohydrate | 3 g | 1 g |
| Serving weight | not listed | 4 g (0.1 oz) |
| Calories | 10 | 10 |
| Sodium | 320 mg | 400 mg |
| Potassium | 55 mg | 100 mg |
| Caffeine | 0 mg | 0 mg |
| Protein | 0 g | 0 g |
| Carbs from | cane sugar | not listed |
| Cost per serving | $0.67 | $1.65 |
| RC Science Score | 100 | 100 |
1 of 4 differ: glucose + fructose.
GU Energy Hydration Drink Tabs
Skratch Labs Clear Hydration Drink Mix
Set your carbs an hour and race length. Both options hit the same target.
| Hydration Drink Tabs | Clear Hydration Drink Mix | Half each | |
|---|---|---|---|
| Electrolytes an hour | 20 | 60 | 10 + 30 |
| Electrolytes for the race | 80 | 240 | 40 + 120 |
| Sodium an hour | 6400 mg | 24000 mg | 15200 mg |
| Cost for the race | $53.60 | $396.00 | $224.80 |
| 20 Hydration Drink Tabs 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
Nuun Sport Tablets4 g of carbs in 5 g (0.2 oz) · $0.75
Lightest to carry
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.