2:1 ratio

The 2:1 advantage

GU Energy gels use a 2:1 ratio of maltodextrin to fructose.

Why does that matter?

Because they use different pathways through your gut wall and into your bloodstream:

Maltodextrin is absorbed via one pathway,

Fructose via another.

That means they don’t compete - this allows your body to take on more grams of carbs per hour without saturating the pathways, which means a reduced risk of stomach issues.

 The result: faster absorption, sustained energy, and better performance when it counts

Compare this to 'another' gel with just 30g of Maltodextrin in. 
It has "more carbs" but that will will sit in your stomach, in a queue, waiting for its time to be absorbed = tummy troubles = slower times.