Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. No matter what you’best tasting g fuel looking for in a running gel, we have you covered.

Get a group of runners together, and you’ll find as many opinions about gels as there are people—and they’re not always flattering. Energy gels, or running gels, are designed to top off your glycogen stores that get depleted during long-distance running. Energy gels are made up of mostly simple sugar, which is your body’s preferred source of fuel during exercise. Many gels also offer electrolytes, which become crucial on long runs, especially in warm weather. Certain gels also provide caffeine, which can help make those later miles feel a little easier.

But Bede says it might help your GI tract to alternate between caffeinated and non-caffeinated gels throughout activity. 30 to 45 minutes for runs 60 minutes or longer, Bede says. Here’s a rundown of some of our favorite energy gels according to what you’re looking for. How We Evaluated When searching for the perfect running gear or nutrition, it can be hard to know where to start. We know you rely on recommendations from fellow runners and the experts at Runner’s World to point you in the right direction. I’ve got seven marathons under my fuel belt and way more half marathons than I can count. When people think of gels, there’s a good chance they’re thinking about the OG GU energy gels.

RELATED VIDEO: What is the Best GU Flavor? Boom Nutrition designs its gels to release energy steadily, compared with other gels that deliver a hit of sugar quickly. Everyone can benefit from this low-sugar, high-carb formula, but it’s particularly good for individuals whose GI tracts are more sensitive. Better still, Boom doesn’t use artificial colors or sweeteners. For a double dose of energy, slip a Double Expresso Clif Shot gel into your pocket or running belt.

Each packet also provides 100 calories and 24 grams of carbs. Yes, Spring Energy is incredibly expensive—more than double the cost of other brands. But you get what you pay for, and in this case, you’re getting all real food. The vegan Canaberry option combines rice, banana, and strawberry with additional ingredients that add flavor and electrolytes.