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The Original Energy Gel

Created for anyone that moves

We first created our original gel packets for ultra-trail runners pushing the boundaries of the sport, but over 25 years later, our Energy Gels are just as crucial for someone running their first 10k as they are for world champion triathletes, cyclists, and runners.

Go with the original

What you eat fuels you. But not all food is right for every effort, and that’s why we invented the original energy gel.

When you’re working out, your body needs easily digestible energy to keep you feeling good and performing at your best. In short, your body needs a source of carbohydrates to burn.

Know Your Fuel Tank

Yes, your body will store fuel from your daily diet that you can convert to energy during shorter and low-intensity activities, but if you’re working out hard or for longer than 45 minutes, you will run out of available fuel… eventually leading you to the dreaded energy bonk.

Keep It Simple

The ingredients you need in a tasty, portable, and easy-to-digest form – that’s our Energy Gel. It sounds simple, and it is for you. GU Energy Gels provide portable and easy-to-digest calories from carbohydrates that deliver immediate and sustained energy while reducing risk of stomach distress.

You can trust us to do the hard work, the research, the testing, and the recipe building to deliver you fuel for your athletic pursuits… whether it’s your first 5k or a century ride.

Eating Is Training

The average body can digest roughly 120-240 calories per hour during exercise. The more you eat, the more your body diverts blood from your muscles to the gut to process food and calories. If your metabolism is slower, then one Energy Gel every 45 minutes works just fine. If you have a faster metabolism, try upping your intake to one Energy Gel every 30 minutes. It's essential to practice and test your nutrition plan to find out what works best for you.

ingredients to feel good, perform better


Carbohydrates are efficient energy, and we use a blend of carbs to deliver more energy into the bloodstream as efficiently as possible. Our system of dual-source carbohydrates provides an “express lane” for each carb to deliver energy to your body much quicker than a single source of carbs, which helps you avoid “the bonk” during training and racing.


Sodium is the #1 electrolyte lost in sweat. It’s crucial to replace it during exercise to help avoid dehydration or a more serious low blood sodium condition known as hyponatremia. Any level of dehydration is not only a health risk, but can also diminish athletic performance.

Amino Acids

Amino acids are the building blocks of proteins, and proteins make up the structure of the human body, including muscles. Amino acids are either produced in the body (nonessential) or must be supplied from the diet (essential). BCAAs are essential amino acids, meaning they are not made in the body, yet they constitute more than one-third of the protein found in human muscle tissue.

The Gu Crew



Our line of ROCTANE Energy Gels are designed for long-duration and high-intensity activities, when you’re trying to up your mileage or push yourself further.

More of what matters

ROCTANE Energy Gels are packed with up to three times as much sodium (depending on the flavor), and three times as many branched-chain amino acids as compared to our original Energy Gels.


Taurine can help maintain heart contractility and improve cardiac output during long exercise sessions


Helps promote formation of the intramuscular buffer carnosine, which can help delay the onset of fatigue during high-intensity efforts.