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Gu Energy gels are a very easy way to replace electrolytes and consume calories during exercise. I take a gel every 45 minutes during long runs. The product does exactly what it says it does. Fruit sugars give you quick energy and complex carbohydrates give you more sustained energy. I noticed a “perk” in energy about 7-10 minutes after I ate one and it lasted for about 30 minutes.

Gu Energy Gels come in a variety of flavors and, although flavor is a personal preference, most of the flavors taste pretty good and don’t leave a funky aftertaste. The consistency of the gel is smooth and does not taste grainy.

The main benefit I see in Gu Energy Gels is convenience. First, they are small and fit almost anywhere. Second, you kill two birds (electrolyte replacement and calorie replacement) with one stone.