During-effort fuel · drink mix · reviewed 28 Aug 2026
SiS GO Energy Drink Powder 48
SiS's original loose-powder isotonic mix carries just 47 g of carbohydrate per 500 ml against Beta Fuel 80's 80 g, and unlike every other drink in this catalog it leans on aspartame rather than added sugar to sweeten a mix that declares no sodium at all.
Score breakdown
Each dimension below is scored 0 to 100 against a fixed scale, not against the rest of the catalog, so adding a product never moves this number. The overall score is the average of the dimensions this product declares data for. How the scales are set →
Comparison
5 of 17 drink mixes heldPrices per single sachet at the cheapest box size we track. Best in green, worst in red, across the gels shown.
| Measure | Science in Sport SiS GO Energy Drink Powder | Tailwind Nutrition Tailwind Endurance Fuel | Skratch Labs Skratch Labs Super High-Carb Sport Drink Mix | Maurten Maurten Drink Mix 320 | Science in Sport SiS Beta Fuel 80 Drink Mix |
|
|---|---|---|---|---|---|---|
| Overall scoreAn average of the various variables measured. | 48 | 48 | 50 | 65 | 66 | |
| CarbohydrateHow much fuel one scoop carries. | 47 g | 25 g | 50 g | 80 g | 80 g | |
| Glucose : fructoseGoverns how fast you absorb it. More fructose, higher ceiling. | n/d | n/d | n/d | n/d | 1 : 0.8 | |
| SodiumAgainst 400 to 1000 mg an hour typically lost in sweat. | 0 mg | 310 mg | 200 mg | 245 mg | 4 mg | |
| ProvenanceWhether that ratio is read off the panel, computed from it, or inferred. | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Stated | |
| Price per scoopWhat one costs. Not comparable across scoop sizes. | $1.40 | $1.03 | $2.62 | $3.64 | $3.87 | |
| Cost per gramThe only price that compares across scoop sizes. | 3 cents | 4.1 cents | 5.2 cents | 4.5 cents | 4.8 cents | |
| Scoops for 90 g/hrHow many you open an hour to hold a 90 g/hr target. | 1.9 | 3.6 | 1.8 | 1.1 | 1.1 |
Verdict
what it does · what it costsWhat it does well
- Minimal-ingredient carbohydrate mix (97% maltodextrin/fructose blend) with no gums or preservatives.
- 32 servings from one 1.6kg tub, a bulk format for athletes who go through a lot of drink mix in training.
- 47 g of carbohydrate per 500 ml is easy to scale up or down by adjusting the scoop count.
What it costs you
- 0 g of sodium declared: unlike SiS's own Beta Fuel 80 Drink, this carries no electrolyte contribution at all.
- Sweetened in part with aspartame, an artificial sweetener some athletes specifically avoid.
- No glucose-to-fructose ratio stated; the panel gives a single combined 97% carbohydrate-mix figure rather than separate percentages.
- Not sold through US retailers; pricing here is converted from GBP and availability will vary.
Where to buy
Prices and links as last checked. The price next to the name above is per unit at the cheapest box size we track; a single-unit price below may run higher.
Who this is for
the numbers, appliedThe field tells you what it is. This is who should act on it.
Worth the money if
- You want a bulk, scoop-dosed powder rather than pre-measured sachets and don't mind adding sodium separately.
- You're carbohydrate-loading and want a mix you can concentrate or dilute to taste.
Look elsewhere if
- You want the drink itself to carry your sodium.
- You avoid artificial sweeteners.