By Ethan BrooksUpdated November 2026
If you are looking for a sports energy gels review that cuts through the marketing, here is the short answer. GU Energy Gels suit runners who want a wide flavor range, a long track record in race-day use and a choice of caffeinated or non-caffeinated versions. Honey Stinger Energy Gels suit runners who prefer a simpler ingredient list, a thicker honey-based texture and a gel that can be taken with or without a full stomach. Both work for marathon fueling. The better pick depends on how your stomach handles sweet, thick gels and how you plan to carry them on race day.
This comparison looks at GU and Honey Stinger side by side on the criteria that actually matter during a long run: carbohydrate content, ingredients, caffeine options, texture, flavor, packaging and race-day fit. For a broader look at the category, see Energy Gels vs Sports Drinks (2026): Which Is Better for Marathon Fueling? and When to Use Energy Gels Running: Timing, Dosing and Race-Day Tips.
Comparison at a Glance
| Criteria | GU Energy Gel | Honey Stinger Energy Gel |
|---|---|---|
| Main carbohydrate source | Maltodextrin with fructose | Honey-based, typically with maltodextrin |
| Typical carbs per packet | Around 22 g | Around 24 g in the standard gel |
| Caffeine options | Caffeinated and non-caffeinated versions | Caffeinated and non-caffeinated versions |
| Texture | Thin, runny gel | Thick, honey-like gel |
| Flavor range | Wide, many fruit and mocha options | Narrower, mostly fruit and honey-based flavors |
| Sodium per packet | Moderate, varies by version | Lower in most standard versions |
| Packaging | Single-serve packets, easy to tear open | Single-serve packets, some with a larger tear strip |
| Best fit | Runners who want variety and a proven race-day format | Runners who prefer a simpler ingredient list and thicker texture |
Note: figures are typical values as listed by the manufacturers and can change between product versions. Always check the label on the packet you buy.
Carbohydrate Content and Carb Type
Winner: GU, for flexibility in carb ratios across its product lines.
Most runners aim for roughly 30 to 60 grams of carbohydrate per hour in long efforts, and many can absorb more if they train their gut to it. Both brands deliver about 22 to 24 grams per packet, so a single gel covers a substantial portion of an hourly target. The difference lies in how the carbohydrate is delivered. GU’s formulas use a blend of maltodextrin and fructose, which many runners find helps with absorption when both sugar types are used together. Honey Stinger’s standard gel relies heavily on maltodextrin with honey as the flavor and texture base.
If your fueling plan depends on a specific ratio, check the label. Neither brand is inherently better for absorption; what matters is how your gut responds in training. Gut training is covered in detail in When to Take Energy Gels: A Marathoner's Timing Guide.
Ingredients and Simplicity
Winner: Honey Stinger, for a shorter and more recognizable ingredient list.
Runners who avoid artificial colors or prefer whole-food-style labels often lean toward Honey Stinger, since its gels are built around honey, fruit concentrates and a small number of added ingredients. GU’s gels include a longer list of components, including electrolytes and flavoring compounds. Neither list is problematic for most healthy adults, but if you have a sensitivity to specific additives, the label comparison matters more than brand reputation. For the science behind one common gel ingredient, see Why Is There Maltodextrin in Energy Gels? Purpose and Trade-Offs.
Caffeine Options
Winner: Tie. Both brands offer caffeinated and non-caffeinated versions.
Caffeine can help with perceived effort in the later stages of a marathon, but its effect varies from person to person. Both GU and Honey Stinger sell caffeinated gels, usually at a moderate dose per packet, and non-caffeinated versions for runners who want to save caffeine for the final miles or avoid it entirely. Check the milligram count on the packet, since doses differ between product lines. If you are testing caffeine for the first time, try it on a long training run before race day. A consultation with a sports dietitian or physician is advisable if you have heart conditions, take medication or are sensitive to stimulants.
Texture and Ease of Swallowing
Winner: GU, for a thinner gel that many runners find easier to take while moving.
Texture is where individual preference matters most. GU’s gel is thin and runny, which means it flows quickly and can be taken with a small sip of water. Honey Stinger’s gel is thick and honey-like, which some runners love for its satisfying consistency and others find heavy. A useful test: squeeze a small amount onto your tongue during a training run at a steady effort. If it sticks to your teeth or makes you gag, try the other texture before race day. Runners who do not want to rely on water can also review Energy Gels vs Sports Drinks (2026): Which Is Better for Marathon Fueling? for alternatives.
Flavor Range and Palatability
Winner: GU, for the broader choice of flavors.
Flavor fatigue sets in quickly over a long race. GU offers a wide spread of fruit and mocha-style options, which makes it easier to rotate flavors across a training block so that no single taste becomes unappealing. Honey Stinger’s range is narrower but leans on honey-based profiles that many runners find less cloying than a pure sugar gel. If you plan to carry gels for a marathon, buy at least two flavors and try both on long runs. For a broader roundup of brands and their flavors, see Top 7 Healthy Energy Gels for Running Worth Considering in 2026.
Packaging and On-Course Convenience
Winner: Tie, with a slight edge to whichever tear strip you find easier to open with gloves or cold fingers.
Both brands use single-serve packets that can be carried in a pocket, a race belt or a hydration vest. Practical tips for either brand: tear the packet open the night before and store the gel in a zip bag if you are carrying several, and practice opening the packet one-handed while running. Cold-weather races can make small tear strips hard to grip, so test your chosen gel in similar conditions during training.
Race-Day Fit and Gut Tolerance
Winner: Depends on the runner. GU has the longer history of use in mass-participation races, while Honey Stinger suits those who want a gentler ingredient profile.
Race-day fit is about how a gel behaves in your stomach at race pace. Runners who have trained with GU and tolerated it well should stick with it. Runners new to gels or those with a sensitive stomach may find the thicker, simpler Honey Stinger format easier to manage. Either way, never try a new gel for the first time on race morning. Practice at race pace and take your gels at the same intervals you plan to use on race day. For a timing framework, see When to Take Energy Gels Running: Timing, Dosage and Race-Day Tips and When to Take Energy Gels During Half Marathon: A Step-by-Step Timing Guide.
Which Should You Choose?
- Choose GU Energy Gels if you want a wide range of flavors, a thin texture that is easy to take on the move, and a caffeinated or non-caffeinated option that matches your race plan.
- Choose Honey Stinger Energy Gels if you prefer a shorter ingredient list, a thicker honey-based texture and a gel with a gentler taste profile.
- Choose GU if you are rotating flavors across a long training block and want variety to avoid taste fatigue.
- Choose Honey Stinger if you find thin gels hard to swallow or want to avoid artificial-sounding ingredients.
- Test both if you are new to gels. Use each on at least two long runs at race pace and note stomach comfort, ease of swallowing and energy levels.
For specific product guidance, see the detailed reviews: GU Energy Gels Review: Flavors, Caffeine, Texture and Race-Day Use and Honey Stinger Energy Gels Review (2026): Pros and Cons.
Product options to consider:
GU Energy Gel: View on Amazon
Honey Stinger Organic Energy Gel: View on Amazon
FAQ
Are sports energy gels necessary for a marathon?
Not strictly, but most runners find that taking carbohydrate during a marathon helps maintain pace in the later miles. Gels are one convenient way to do this. Sports drinks, chews and solid foods like bananas are alternatives. The right choice depends on your gut tolerance and what is provided on the course.
How many gels should I take in a marathon?
Many runners take one gel roughly every 30 to 45 minutes, which works out to around three to five gels over a marathon depending on pace and personal target. Practice your plan in training before committing to it on race day, and adjust based on how you feel. Consult a sports dietitian if you have a medical condition that affects your blood sugar.
Should I take energy gels with water?
Most manufacturers recommend taking gels with water to aid digestion and absorption. Take a few small sips of water with each gel, and avoid drinking large volumes at once, which can cause stomach discomfort. Practice this combination in training so your body knows what to expect.
Do energy gels cause stomach problems?
They can, especially if taken without enough water, at too high a concentration, or without prior gut training. Gastrointestinal discomfort is common in endurance sport. Start with one gel in long training runs, increase gradually and avoid trying new products on race day. If you have persistent digestive symptoms, speak with a physician.
Can I use gels for a half marathon?
Many half marathoners do not need gels, since a well-fueled start and a moderate carb intake before the race can be enough for most people. Runners who push hard or race in warm weather may benefit from one gel in the second half of the race. Test whether you need one in training before race day.
Conclusion
Both GU and Honey Stinger are established options for runners who want a convenient, portable carbohydrate source. GU tends to win on flavor variety and thin texture, which make it easier to rotate and swallow on the move. Honey Stinger tends to win on ingredient simplicity and a thicker, honey-based feel that some runners prefer. The best gel is the one your stomach tolerates at race pace, so run a few long sessions with each before you commit. If you are building a full fueling plan, pair your gel choice with the timing guidance in the articles linked above, and consult a sports dietitian for personalized advice.
About Ethan Brooks
Ethan Brooks is part of our editorial team and reviews and edits our marathon & half-marathon guides, checking product details against manufacturer specifications and owner feedback.
