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Finding an energy supplement for running that doesn’t wreck your stomach is the real battle. The best options here deliver carbs fast, taste decent, and sit quietly while you push through the miles—not churn in your gut. This guide breaks down the gels, chews, and tablets that actually earn a spot in your running vest.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Ready to find fuel you can trust on race day? Here is the honest breakdown of the best energy supplement for running to keep you moving strong.
Our Picks at a Glance
How To Choose The Best Energy Supplement for Running
Your stomach is the real gatekeeper here. A supplement with perfect specs fails if it causes cramps or nausea mid-run, so digestion tops the list. After that, you match the carb dose and format to how long and how hard you run.
Match the format to your run
Gels are the classic choice for quick carbs without chewing, but their texture divides runners. Chews and gummies need more effort to eat but offer a more familiar, snack-like feel that many find easier to handle at pace. Drink tablets deliver carbs and electrolytes through fluids, ideal for those who struggle with solid fuel.
Count the carbs, not just the calories
Carbs are the primary fuel your muscles burn, so a higher gram count per serving generally means more usable energy. Pay attention to the type—some use a fructose-to-glucose ratio designed to be gentler on the stomach and absorbed faster. Also, consider caffeine. Some gels add it for an extra kick, but it’s a personal choice, especially for afternoon runs.
Quick Comparison
| Model | Best For | Format | Carbs per Serving | Extra Boost | Amazon |
|---|---|---|---|---|---|
| Maurten Gel 100 Mix★ Best Overall | Sensitive Stomachs | Hydrogel | 25g | 100mg Caffeine (2 packs) | Amazon |
| SiS GO Isotonic GelBest Value | No-Water Fueling | Isotonic Gel | — | None | Amazon |
| PROBAR Bolt ChewsTop Performer | All-Day Snacking | Organic Chews | — | Electrolytes & B Vitamins | Amazon |
| Skratch Labs Chews | Real Fruit Taste | Chews | 19g | None | Amazon |
| SaltStick Energy Gummies | Electrolyte Replacement | Gummies | 36g | 170mg Sodium/Potassium | Amazon |
| BPN Go Gel | Clean Ingredients | Gel | 24g | Electrolytes | Amazon |
| GU Liquid Energy Gel | Quick Liquid Hit | Liquid Gel | — | Branched-chain amino acids | Amazon |
| Nuun Sport + Caffeine | Hydration & Boost | Dissolvable Tablet | — | 40mg Caffeine & Electrolytes | Amazon |
| Huma Plus Chia Gel | Real Food Fuel | Chia Gel | — | 25mg Caffeine & Electrolytes | Amazon |
In‑Depth Reviews
1. Maurten Gel 100 Mix Box
Our pick — over 4.5★ from 950+ verified ratings; the strongest balance of quality and price.
The gold standard for runners whose stomachs rebel against traditional gels.
This mix box solves the two biggest race-day problems: stomach distress and a late-race energy crash. It combines four servings of the standard Gel100 with two servings of Gel100 CAF100, each of those packing 100mg of caffeine—roughly the punch of 1.5 cups of espresso—for when you need a late-race lift.
You can fuel up without the dreaded stomach cramps, thanks to its patented hydrogel technology (a gel that turns liquid in your stomach, so it moves to your intestine faster than a thick syrup). That’s why “easiest gel to consume; no stomach issues” is a recurring theme across long runs and marathons. Each serving delivers 25g of carbohydrates with a fructose-to-glucose ratio of 0.8:1, designed for faster absorption and an intake of up to 100g of carbs per hour.
It’s made with pure, natural ingredients and has no added flavors, just a mildly sweet taste that owners describe as a cross between marshmallow and jello. The trade-off is the price tag and a texture that some find unusual. The digestibility and taste win people over consistently, though opinions on the value—and that jelly-like feel—are genuinely split.
What Wins People Over
- Digestibility is the #1 praised aspect, with 25 owners noting its stomach-friendly nature.
- Taste follows closely at 24 mentions, with many calling it mildly sweet with no aftertaste.
- Built for endurance, enabling 100g of carbohydrate intake per hour.
The Honest Trade-Offs
- Value for money is a mixed point for 16 owners, with some finding it pricey.
- The texture is divisive—13 people mention it, and not all are fans of the jelly feel.
- Requires storage at room temperature between 10 to 30°C (50 to 85°F).
Reach for this if: you have a sensitive stomach and need reliable, no-drama fuel for long runs and marathons.
Look elsewhere if: you prefer a thicker, more traditional gel texture or are strictly watching your budget.
2. SiS GO Isotonic Energy Gel
The original no-water gel that goes down light and keeps you moving.
This was the world’s first isotonic gel, meaning its concentration matches your body’s natural fluids for quicker absorption. That design lets you take it without water, which cuts the risk of feeling bloated from over-drinking—a huge plus when you’re trying to hold pace.
Buyers report using it as a “nice addendum to regular gels that do require water,” and one trail user summed up the experience in a 30km race: “easy to digest and wash down with a sip or two of water, if required.” It’s a lighter alternative to the thicker options on this list, with a “perfect light taste” that’s not overly sweet.
The one consistent gripe is the packaging size—it’s a bit bulky to carry several for very long runs. It also lacks the caffeine or extra electrolyte boost of some competitors, so it’s purely a carb-delivery tool. This is a straightforward, affordable choice for runners who want reliable energy without the gut-check.
The Core Strength: easy digestion and no water requirement make it a simple to use choice for mid-run fuel, as confirmed by racers using it at the start and at the 15km mark.
The Main Limitation: The larger sachet size makes it less practical for carrying multiple gels on marathon-length efforts.
3. PROBAR Bolt Energy Chews
The snackable fuel that doesn’t stick to your teeth or slow you down.
These chews are for runners who want the convenience of a gel without the goo. They deliver quick carbohydrates from a USDA Organic, superfruit blend of acai, blueberry, and pomegranate—no artificial flavors, no gelatin, and no caffeine. They’re also vegan and gluten-free, making them a clean choice for many diets.
Beyond carbs, they’re formulated with electrolytes plus vitamins B6 and B12 to support hydration and energy metabolism. The real-world verdict is overwhelming: “I use these for long runs (over 10 miles) and for obvious longer (20+) wayy more than 1 pack,” confirms one long-distance runner, with no GI issues even when switching flavors. Another owner with ARFID calls them “without a doubt the most palatable energy chews on the market.”
The thing everyone raves about is the taste—26 owners single it out—and their effectiveness, with 18 more noting they help power through heavy exercise. The main drawback is that you need to chew, which can be slightly less convenient than a gel at race pace, and they lack the caffeine kick for those who want it.
Why Runners Love Them
- Taste is the most-praised feature with 26 owner mentions, praised as the “most palatable” on the market.
- Effectiveness follows at 18 mentions, helping with heavy exercise and long tournament days.
- Clean organic ingredients with no artificial flavors or gelatin.
Things to Note
- Adding electrolytes and B vitamins is great, but the lack of added caffeine may not suit everyone.
- Requires deliberate chewing, which can be a minor hassle at high intensity.
Pick these if: you value clean, organic ingredients and a tasty chewable format for long hikes and runs.
Think twice if: you prefer a quick, no-chew gel for race day or want a caffeine boost included.
4. Skratch Labs Energy Chews
The heat-proof chew with real fruit flavor that endurance athletes swear by.
This variety pack is engineered to beat the two things that ruin mid-run fuel: stickiness and stomach upset. Each package contains two servings of 19g of fast-acting carbohydrates, sourced from a blend of glucose and fructose for steady energy. The texture is specifically designed to be easy to digest and more pleasant to process than sticky gels or blocks.
Made with real fruit, they avoid artificial sweeteners, colors, and preservatives that can cause GI distress. The proof is in the extremes: “They do not get sticky in the heat (tested during 140 mile ride in the Texas summer),” reports one owner. The taste is the overwhelming winner here—87 owners praise it, with the sour cherry variety getting special mention—and their effectiveness for ultra and long runs is a close second at 41 mentions.
The downsides are narrow but real. One owner, a cyclist and type 1 diabetic, notes “they are very sweet,” and at least one family found they caused stomach upset, possibly from plant sweeteners. This means they’re not for everyone, but for most, they’re a reliable, great-tasting fuel that goes down easy in the heat. The 19g carb count is also noticeably lower per serving than the 25g in the Maurten gel.
The Standout Feature: Flavor is king here—87 owners call out the great taste, making it the most-praised aspect by far.
The Honest Catch: While being easy on most stomachs, the sweetness and sweeteners can be an issue for a sensitive few, and the per-serving carbs are lower than top gels.
5. SaltStick Energy Gummies
A powerful little gummy that packs carbs and electrolytes for hot, long efforts.
This is the pick for runners who lose a lot of salt through sweat and need to replace it fast. Each packet delivers a hefty 36g of fast-acting carbs for fuel, plus 170mg of sodium and potassium to replenish what you lose. It also packs over 100% of your daily Vitamin C, making it a more complete fuel than a simple sugar gel.
Owners are quick to note how effective they are during runs, helping them “push through longer workouts” and providing “a good energy boost.” The taste is a major win, with 56 owners praising the flavor variety, and their portability—easy to toss in a bag or purse—gets a nod too. As “my new trail essential,” one hiker described them as “surprisingly powerful little gummies” during a hot trip through desert trails.
The texture is often compared to regular fruit snacks, which makes them approachable for those who dislike gels. The main consideration is that you must chew them, and the 36g carbs per packet is spread across the packet, so you’ll eat a few at a time. They’re free from the 9 most common allergens and vegan, making them a broadly accessible choice.
What Owners Applaud
- Taste leads the praise with 56 mentions, praised for its delicious flavor variety.
- Effectiveness at 35 mentions, with many noting it helps push through longer workouts.
- High carb load of 36g and 170mg of sodium/potassium per packet.
What to Consider
- You have to chew them, which some runners avoid mid-effort.
- Packing both carbs and electrolytes is great, but it’s a more complex formula than pure carb gels.
Grab these if: you sweat heavily, run in heat, and want a tasty, portable way to replace carbs and electrolytes.
Skip them if: you prefer a no-chew gel or want a simple, single-purpose carb source.
6. BPN Go Gel Endurance
The applesauce-consistency gel that feels like real food, not a science experiment.
This gel wins on pure palatability. The apple cinnamon flavor is so natural that owners say it “tastes like applesauce” and even “Go-Go Squeeze,” a texture far less thick and slimy than other brands. That approachable consistency makes it a favorite for runners with a sensitive stomach.
Each single-serving pack provides 24g of carbohydrates and 100 calories for quick fuel, plus essential electrolytes to help maintain hydration and prevent cramps during intense workouts. It’s crafted with high-quality, natural ingredients, with no artificial additives or flavors, and is both vegan and gluten-free. Its effectiveness is well-documented, with owners reporting it “powered me through a 64k ultramarathon in Madeira” and provided a noticeable boost during a half marathon.
The feedback is remarkably consistent: great taste, easy to digest, and it doesn’t cause stomach aches. Long-term users swear by it—”used 1 year” and “will never go back to any other gel” are common refrains. The only real downside is that it’s pricier than some competitors, which makes it a special-occasion fuel for race days rather than an everyday training staple for some.
The Winning Formula: The natural applesauce-like texture and clean ingredients solve the two biggest gel complaints—taste and GI distress.
The Cost of Quality: It’s positioned as a higher-end option, which some owners reserve for key races over daily training.
7. GU Energy Liquid Energy Gel
A thinner, faster liquid fuel for runners who find thick gels hard to swallow.
This is a different beast from the syrupy gels on this list. GU’s Liquid Energy is a more fluid formula that goes down easier for many athletes, delivering 100 calories and essential electrolytes in a portable, refreshingly light form. It uses a dual-source energy blend from maltodextrin and fructose, which work through non-competing pathways for efficient absorption and longer-lasting energy.
It’s a strong performer for long runs, with buyers reporting it provides “a huge boost” that “works fast” and is “great for long runs.” The effectiveness is the top positive aspect, with 17 owners praising it, followed closely by the energy boost at 16. The assorted flavors—3 Coffee, 3 Lemonade, 2 Orange, 2 Strawberry Banana, 2 Cola—are a mixed bag, with the coffee flavor drawing criticism while cola, lemon, and orange get high marks.
The trade-off is in the delivery. The liquid requires two squeezes to extract and can leave residue in the packet, making it tricky to empty one-handed while running. Some find it stickier and harder to manage than a traditional gel, and the taste is a genuine fit-note, not a universal win. It also includes branched-chain amino acids to help decrease muscle damage and mental fatigue, a unique addition here.
Its Strengths
- Effectiveness is the #1 praised aspect with 17 mentions, delivering a fast, big energy hit.
- Liquid form is easier to swallow for those who dislike thick gels.
- Added branched-chain amino acids for muscle support.
Its Quirks
- Taste is the most-mentioned but MIXED point—coffee is disliked, while cola and citrus are praised.
- Ease of use is divisive, with 40 mentions around the difficulty of getting it all out and stickiness.
Choose this if: you want a fast, liquid hit of energy and prefer drinking your fuel over chewing or swallowing thick gels.
Pass it by if: you’re a novice runner who values easy, one-handed packet management and consistent flavor.
8. Nuun Sport + Caffeine Tablets
The hydration-first fuel that turns any water bottle into a run-ready drink.
This is the choice for runners who struggle to take in solid fuel mid-run. Each tablet dissolves in water to create a light, refreshing drink that replaces essential electrolytes lost through sweat. The “Sport + Caffeine” formula adds a gentle 40mg of caffeine from Green Tea Leaf Extract for a subtle energy boost without the jitters.
It’s built around 5 essential electrolytes: each tablet provides 300mg Sodium, 40mg Chloride, 25mg Magnesium, and 13mg Calcium, plus Potassium, to support hydration. The variety 6-pack includes three caffeinated and three non-caffeinated flavors—Strawberry Lemonade, Lemon Lime, Tri-Berry, Wild Berry, Cherry Limeade, and Fresh Lime—giving you 60 total servings. Owners find them “a life saver after workouts” and appreciate the hydration benefits for endurance training.
They’re also refreshingly carbonated, which some runners enjoy. The flavor is intentionally not too sweet, which is a plus for some and a miss for others who prefer a stronger taste. It has just 1g of sugar and is non-GMO, vegan, and gluten-free. This isn’t a high-carb fuel source, but it’s an excellent companion for keeping hydration and energy steady on long, hot runs.
The Big Advantage: class-leading versatility—it’s compact, easy to travel with, and doubles as your hydration and a light energy source in one.
The Known Limitation: It’s less sweet-tasting than rival drinks, and the caffeine content is moderate, so it won’t replace a dedicated carb gel for fueling.
9. Huma Plus Chia Energy Gel
The real-food gel that finally makes marathon nutrition easy on the stomach.
For runners who’ve “been racing with stomach issues” for years, this gel is a revelation. Its formula is built on real food—fruit purees, powdered chia seeds, and brown rice syrup—rather than the dextrose and maltodextrin found in conventional gels. The finely powdered chia seeds help modulate even energy output, and the 2:1 ratio of short & long chain glucose to fructose boost carbohydrate uptake.
This “Plus” version doubles the electrolytes of the original Huma Gel, sourced from sea salt, fruit, and chia seeds, providing 245mg of sodium and potassium. It also packs 25mg of caffeine, and all 9 essential amino acids. The strawberry lemonade flavor is a crowd-pleaser, with 67 owners praising the taste, making it the most-praised aspect. “Converted from GU due to stomach issues,” one marathoner notes, “Tastes better, more natural… No stomach aggravation.”
The feedback is remarkably strong: “This is all I use now during races and training for both marathons and ultra marathons.” Digestibility is the second most-praised aspect at 39 mentions, with owners reporting steady energy without a crash. The main caveat is that the tangy, strong flavor isn’t for everyone—at least one owner found it too intense. It’s also a premium-priced option, making it a race-day investment for many.
The Real-Food Edge
- Taste is the #1 praised aspect with 67 mentions, especially the strawberry lemonade flavor.
- Digestibility is a close second at 39 mentions, with many converting from other gels due to stomach issues.
- Powered by real-food ingredients like chia seeds, fruit purees, and brown rice syrup.
The Trade-Offs
- The strong, tangy flavor is a love-it-or-hate-it point among owners.
- Sits at a premium price point, making it a special-occasion fuel for many.
Reach for this if: you have a history of stomach issues with traditional gels and want real-food fuel for marathons and ultras.
Be cautious if: you prefer mild, neutral flavors or are looking for a budget-friendly everyday training gel.
Understanding the Specs
Carbohydrates per Serving
The fuel your muscles burn for energy. A higher gram count per serving generally means more sustained energy, but it also means more work for your stomach. A gel with 24g or 25g provides a strong dose, while a chew with 19g offers a lighter hit, which can be easier to manage.
Electrolytes & Caffeine
Electrolytes like sodium, potassium, and magnesium replace what you lose through sweat, preventing cramps and maintaining hydration. Caffeine is a stimulant that can provide a focused energy boost, but it’s a personal choice—especially for afternoon runs or if you’re sensitive to it. if you need 25mg or 100mg depends on your tolerance and the length of your effort.
FAQ
How is a gel different from a chew for running fuel?
Do I need water to take an energy gel?
What does “isotonic” mean in a sports gel?
How much caffeine is in a running gel?
Can I use energy chews for a marathon?
What are the benefits of chia seeds in an energy gel?
How do I prevent stomach cramps from energy supplements?
Are these supplements vegan and gluten-free?
What is the “transparent” or “hydrogel” technology in Maurten?
Is a drink tablet like Nuun enough for a long run?
Final Thoughts: The Verdict
If you want one dependable pick, the energy supplement for running winner is the Maurten Gel 100 Mix because it solves the biggest problem runners face—stomach distress—with its patented hydrogel technology, and it still delivers a solid 25g of carbs along with a caffeine option. If you want a great-tasting, stomach-friendly real-food gel, grab the Huma Plus Chia Gel. And for a budget-friendly, no-water option that’s easy on the gut, the SiS GO Isotonic Gel is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.