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WOLF PICKS · FUEL · GELS

Carb gels: what the labels say.

Three gels compared on manufacturer-declared data.

Maurten Gel 100Science in Sport (SiS) BETA Fuel GelPrecision Fuel & Hydration PF 30 Gel
Carbs per serving25 g40 g30 g
Ratioglucose:fructose 1:0.8maltodextrin:fructose 1:0.8not stated
Sachet weight40 gnot statednot stated
Energyabout 100 kcalnot statednot stated
Texturehydrogel (alginate), taken without waterliquid geldesigned to be less sticky, neutral "Original" flavor
Caffeine versionGel 100 Caf 100 with caffeinenot statednot stated
List pricenot verifiednot verifiednot verified

Manufacturer data, read on their pages on 28/10/2026. "Not stated": the page we read does not report it.

How to read them

  • Carbs per serving: grams matter, not the number of gels. Reaching the same hourly intake takes more sachets with a 25 g gel than with a 40 g one.
  • Glucose and fructose ratio: the two gels that declare it use 1:0.8. The ratio is about how carbohydrates are absorbed; the article below summarises a study on amounts.
  • Tolerance: train with it before race day, same brand and same amount.

Carbohydrates in the marathon: what the studies say →

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