Best Energy Gels for Marathon Running: What Actually Works on Race Day

By mile 18 of the Chicago Marathon a few years back, one of the runners I was working with grabbed a caffeinated gel, chased it with two cups of sports drink, and immediately knew something was off. Not tired-off. More like “my stomach just declared war” off. She’d trained hard for months, nailed her pacing, and still ended up walking aid stations because her fueling plan fell apart. That’s the thing with energy gels for marathon running — when they work, you barely notice them. When they don’t, your whole race can unravel fast.

Why So Many Marathoners Get Their Fueling Wrong

Look, I get it. Most runners spend weeks obsessing over shoes, pace targets, and training splits while treating fueling like an afterthought. Then race day shows up, and suddenly they’re squeezing random gels into their mouths every 45 minutes because that’s what somebody on TikTok said worked.

That approach usually backfires.

According to the American College of Sports Medicine, endurance athletes performing longer than 2.5 hours often benefit from 60 to 90 grams of carbohydrates per hour during prolonged exercise. That’s a pretty wide range, and honestly, most runners never test where they personally fall inside it.

Here’s where it gets interesting. The best energy gels for marathon running are not always the ones with the fanciest ingredients or the biggest sponsorship deals. More often than not, the winner is simply the gel your stomach tolerates under stress.

I’ve seen runners crush personal bests using basic GU Energy Gel while others swear Maurten Gel 100 is the only thing that doesn’t make them nauseous after mile 20. Same marathon. Same weather. Totally different gut response.

A few years ago, I tested six marathon fueling products during a humid summer training cycle before the New York City Marathon. Not in a lab. Just real-world long runs with actual marathon pace efforts mixed in. One gel tasted amazing standing still in my kitchen and became completely unbearable during a 90-degree progression run. Another tasted weirdly bland but ended up being the only one I could tolerate late into a three-hour run.

Been there?

That’s why copying someone else’s fueling strategy is kind of like borrowing prescription glasses. Sure, maybe you can see a little better. But if the fit is wrong, everything still feels blurry.

If you’re building a race-day plan right now, pairing your fueling practice with a structured schedule matters a lot more than people think. That’s exactly why runners following a detailed 16-week marathon training schedule usually handle nutrition testing better than runners who just wing their long runs every weekend.

What Your Body Really Needs After Mile 16

The first half of a marathon can trick you.

Seriously. Glycogen stores are still hanging on, adrenaline is high, crowds are loud, and your legs feel surprisingly smooth. Then somewhere around mile 16 to 20, things change. Fast.

That famous “wall” runners talk about? A huge part of it comes down to depleted carbohydrate availability. Your body starts rationing energy like a phone battery stuck at 3%.

Real talk: most runners don’t bonk because they aren’t fit enough. They bonk because they underfuel early and try to fix it too late.

The best energy gels for marathon running solve two specific problems:

• They provide usable carbohydrates quickly
• They help maintain stable energy without wrecking digestion

Sounds simple. It’s not.

Some gels use multiple carbohydrate sources like glucose and fructose to improve absorption rates. Maurten, for example, uses hydrogel technology that wraps carbohydrates in a gel matrix designed to move through the stomach more comfortably. Science-heavy? A little. Effective for many runners? Absolutely.

Others like SiS Beta Fuel focus on higher carb delivery per serving, which can be a solid option for faster marathoners pushing aggressive pace goals.

And yeah, caffeine matters too. According to the International Society of Sports Nutrition, caffeine may improve endurance performance and perceived effort during long races. But here’s what nobody tells you: caffeine tolerance during a marathon is wildly different from caffeine tolerance sitting at your desk.

I’ve had runners tolerate triple espresso every morning and still get shaky from a caffeinated gel at mile 21.

If you’re already working on improving endurance pacing, combining fueling strategy with smart pacing work from guides like how to improve marathon pace makes a massive difference late in races.

Carbs vs Electrolytes vs Caffeine: What Matters Most?

Short answer? Carbs win. Every time.

Electrolytes matter for hydration balance, especially during hot races, but they don’t replace calories. Caffeine can help sharpen focus and reduce perceived fatigue, but it doesn’t magically refill glycogen stores.

Think of marathon fueling like keeping a campfire alive. Carbohydrates are the actual firewood. Electrolytes are the airflow helping the fire burn properly. Caffeine? That’s somebody tossing gasoline on the flames for a temporary boost. Helpful sometimes, risky if overdone.

Most runners should prioritize:

1. Consistent carbohydrate intake
2. Hydration timing
3. Electrolytes based on sweat loss
4. Strategic caffeine use late in the race

Not the other way around.

One mistake I see constantly is runners relying on electrolyte-only products because they’re scared of stomach issues from gels. Fair enough. But low-carb fueling almost always catches up to you eventually.

And yeah, that matters more than you’d think.

The Gut Training Mistake That Wrecks Race Day

Here’s the thing nobody loves hearing: your stomach needs training too.

You can’t spend four months practicing pace, heart rate zones, and cadence while completely ignoring digestion under effort. Yet runners do it all the time.

A lot of marathoners test a gel once during an easy six-mile jog and decide they’re “good to go.” That’s not testing. That’s sampling.

Proper fueling practice means trying marathon nutrition supplements during:

• Long runs over 90 minutes
• Marathon pace sessions
• Warm-weather training
• Back-to-back hard effort weeks

Why? Because stress changes digestion.

Honestly? This part surprised even me when I first started working closely with endurance athletes. The exact same gel can feel perfectly fine during an easy Zone 2 run and absolutely terrible during race-pace intervals.

One athlete I coached tolerated Honey Stinger gels beautifully during training but couldn’t stomach them once race nerves kicked in on marathon morning. We switched her to Maurten because the texture was less sweet and easier mentally during high effort. Problem solved within two long runs.

If you’re still figuring out your broader nutrition setup, guides like best marathon nutrition plan and common marathon nutrition mistakes help connect the dots between daily eating and race fueling.

How I Test Energy Gels for Marathon Running With Athletes

Okay, so here’s my rule: if a gel only works under perfect conditions, it’s not a great marathon gel.

When testing endurance gels review products with runners, I usually focus on four areas:

Test Category	What We Look For	Why It Matters
Digestibility	Any nausea, bloating, reflux	Stomach comfort decides race execution
Texture	Easy to swallow while breathing hard	Thick gels can become unbearable late race
Carb Delivery	Grams of carbs per serving	Helps match fueling targets
Flavor Fatigue	Can you still tolerate it after 2+ hours?	Sweetness overload is real

Flavor fatigue is low-key one of the biggest issues nobody talks about enough.

A super sugary gel might taste great at mile 3 and feel absolutely disgusting at mile 23. That’s partly why neutral-flavored options like Maurten exploded in popularity among serious marathoners.

At the same time, not every runner needs premium gels costing $4 to $6 each. If you’re training for your first marathon and just need a reliable, affordable option, products like GU or Clif Shot can still get the job done perfectly well.

No, seriously.

I also encourage runners to test fueling alongside hydration systems during long training blocks. If you’re already carrying fluids during long runs, pairing gels with one of these top hydration packs for marathon training can make consistent fueling way easier.

And if you ask me, consistency beats complexity nine times out of ten.

That stomach-training piece from earlier? This is where it starts paying off, because once you know your gut can handle fuel under pressure, choosing the right gel becomes way less overwhelming.

Best Overall Energy Gels for Marathon Running in 2026

Not all marathon fueling products are built for the same runner. Some are designed for speed. Others focus on digestion. A few try to do both and end up kind of average at everything.

After testing dozens of endurance gels review products with recreational runners and sub-3 marathoners alike, these are the standouts that consistently perform when the race gets ugly.

Energy Gel	Best For	Carbs Per Serving	Texture	Caffeine Option
Maurten Gel 100	Sensitive stomachs	25g	Smooth hydrogel	Yes
GU Energy Gel	Budget-friendly fueling	22g	Thick	Yes
SiS Beta Fuel	Aggressive carb intake	40g	Thin liquid gel	Yes
Honey Stinger Gold	More natural taste	24g	Syrupy	Yes
Precision Fuel PF 90	High-carb marathoners	90g pouch	Drinkable gel	No

Maurten still sits at the top for a lot of marathon runners. Not because it’s trendy. Because it works under race stress.

The hydrogel texture avoids that sticky candy feeling many gels create after two hours of running. And during marathons, texture matters way more than people expect. Try swallowing peanut butter while sprinting up stairs. That’s basically what thick gels feel like late in a race.

GU, though? Still a solid pick.

Some runners act like cheaper gels automatically mean lower performance. Fair enough. But according to a 2024 review published in Sports Medicine, carbohydrate availability matters far more than fancy branding if absorption and tolerance are similar.

So if GU works for your stomach, it’s honestly an easy win financially.

Best for Sensitive Stomachs

Maurten Gel 100. Hands down.

I’ve seen runners with notoriously fragile stomachs finally complete marathons without nausea after switching to Maurten. The neutral flavor helps, but the real difference seems to be the lower sweetness intensity and hydrogel structure.

That said, it’s not exactly cheap.

Training with Maurten for every long run can add up fast, especially if you’re using 5-7 gels weekly during peak marathon training. One strategy I recommend is using cheaper gels during training and saving Maurten for key long runs plus race day.

Kind of like saving race shoes for workouts that actually matter.

If you’re dealing with recurring GI issues during marathon prep, dialing in your broader recovery habits matters too. Runners often overlook how dehydration and fatigue affect digestion. Guides like marathon recovery strategies and signs of overtraining in marathon runners connect more closely to fueling than most people realize.

Best High-Carb Gel for Fast Marathon Times

SiS Beta Fuel deserves real credit here.

Forty grams of carbs per serving is kind of a big deal if you’re chasing aggressive pace goals or trying to avoid carrying six separate gels during a race. Elite marathoners increasingly push carb intake above 80 grams per hour, especially during faster races.

But here’s the catch.

High-carb fueling only works if your stomach is trained for it. Otherwise, it’s like dumping too many logs onto a fire at once. The system gets overwhelmed.

I’ve seen ambitious runners switch to super-high-carb plans two weeks before a marathon because some pro runner mentioned it on YouTube. Bad move.

If you’re experimenting with high-carb marathon fueling products, test them during harder efforts first — especially progression long runs and marathon pace blocks from structured plans like this high-mileage marathon training guide.

Best Budget Marathon Fueling Product

GU Energy Gel keeps winning this category because it simply delivers reliable fuel at a lower cost.

No flashy science. No fancy packaging. Just carbohydrates, sodium, optional caffeine, and tons of flavor choices.

Is it the smoothest texture? Nope.

Does it sometimes feel overly sweet late in races? Absolutely.

Still, for first-time marathoners building consistency, GU is more than good enough for most people. And honestly, that’s all many runners need.

One underrated trick? Refrigerate GU gels before summer long runs. Sounds weird, but colder texture usually goes down easier during humid training sessions.

Maurten vs GU vs SiS: Which One Is Actually Worth Buying?

Okay, so here’s the direct answer most comparison articles dance around: if your stomach struggles during races, Maurten is worth the extra money. If your stomach is generally reliable and budget matters, GU is still a legit choice. And if you’re racing aggressively and want higher carb intake with fewer packets, SiS Beta Fuel is probably your best bet.

That’s the side I’d pick after years of watching real runners test these products.

The problem with most endurance gels review content online is that it treats every runner like they’re identical. They aren’t.

A sub-5 marathoner running conservatively through aid stations has very different fueling demands compared to a sub-3 runner trying to hold threshold pace deep into the race.

Here’s where it gets interesting.

Maurten performs best under intensity. The harder the effort, the more valuable that smoother digestion becomes. Meanwhile, GU tends to perform perfectly fine for moderate marathon pacing where runners can tolerate thicker textures more comfortably.

Texture, Taste, and Stomach Comfort Compared

Brand	Sweetness Level	Texture Feel	Late-Race Tolerance
Maurten	Mild	Jelly-like	Excellent
GU	Sweet	Thick paste	Moderate
SiS	Light	Thin liquid	Very Good
Honey Stinger	Medium-sweet	Syrupy	Moderate

Texture fatigue is real. Seriously.

Around mile 20, even tiny annoyances become amplified. That’s why runners who love thick chocolate gels during training suddenly hate them during races.

And yeah, flavor matters psychologically too.

Neutral flavors reduce what sports dietitians sometimes call “taste burnout,” where your brain simply gets tired of sweet foods after repeated intake. That’s partly why marathoners often combine gels with plain water rather than sports drink overload.

If you’re already experimenting with hydration timing, pairing these strategies with a proper marathon hydration strategy makes fueling feel way more manageable.

Which Gel Gives the Most Reliable Energy Late in the Race?

Maurten and SiS consistently perform best here.

Not because they contain magical ingredients. Mostly because runners can continue consuming them late into races without developing flavor aversion or stomach revolt.

That’s the hidden battle most people miss.

Energy gels for marathon running only help if you can physically keep taking them when exhausted. Sounds obvious, right? Yet tons of runners choose products based entirely on taste-testing them while standing still in running stores.

Real talk: marathon fueling should always be tested while moving at effort.

Here’s a simple process I use with athletes:

1. Test one gel type during easy long runs
2. Retest during marathon pace workouts
3. Add caffeine only after digestion feels stable
4. Practice exact race timing repeatedly
5. Avoid mixing random products on race day

No experimenting during the marathon itself. Ever.

How Many Energy Gels Do You Really Need for a Marathon?

Most runners underfuel. By a lot.

A common mistake is taking only two or three gels for an entire marathon because runners worry about stomach discomfort. Ironically, underfueling often creates the fatigue and nausea they were trying to avoid in the first place.

According to current endurance nutrition guidelines from the International Olympic Committee, marathon runners commonly target between 30 and 90 grams of carbohydrates per hour depending on pace, body size, and gut training.

Here’s the simple version most runners can actually use:

Marathon Finish Time	Suggested Carb Intake	Approximate Gel Use
3 hours or less	70-90g/hour	1.5-2 gels/hour
3-4 hours	50-70g/hour	1-1.5 gels/hour
4+ hours	30-50g/hour	1 gel/hour

That’s a starting point, not a rigid rule.

Weather changes things. Intensity changes things. Stomach tolerance changes everything.

And yes, caffeine timing matters too. I usually suggest saving caffeinated gels for the second half of the race unless runners already know they tolerate caffeine extremely well.

Why waste the mental boost at mile 4 when mile 22 exists?

A Simple Fueling Schedule Most Runners Can Follow

If you’re newer to marathon fueling, keep it boring at first. Consistency beats cleverness.

1. Take first gel around 30-40 minutes into the race
2. Continue every 30-40 minutes afterward
3. Drink water with most gels
4. Use caffeine only during the second half
5. Practice this exact timing during long runs

That’s it.

No complicated spreadsheets needed.

If you’re balancing fueling practice alongside a busy schedule, runners training while juggling careers often do better with simplified systems like the ones outlined in training for a marathon while working full time.

What Changes if You’re Racing Under 3:30?

Faster marathon pacing usually means higher carbohydrate demands because intensity increases carb burn rates.

Sub-3:30 runners often benefit from pushing closer to 70-90 grams of carbs hourly. That’s where products like SiS Beta Fuel or Precision Fuel become more useful because carrying fewer packets reduces logistical hassle.

Still, don’t force high-carb strategies if your gut isn’t ready.

Honestly, finishing slightly underfueled is still better than spending six miles doubled over from stomach cramps

The funny part about marathon fueling is that most runners spend months searching for the “perfect” gel when the bigger win usually comes from practicing consistently with a decent one.

The Marathon Fueling Mistakes I See Over and Over Again

Some mistakes are obvious. Others sneak up on runners quietly and ruin races anyway.

The biggest one? Treating race-day nutrition like a math problem instead of a skill.

I’ve watched runners memorize carb targets down to the gram while completely ignoring practical stuff like carrying gels comfortably, opening packets with sweaty hands, or drinking enough water alongside them. Sound familiar?

Here are the usual suspects that cause trouble fast:

• Taking gels too late into the race
• Mixing unfamiliar products on marathon morning
• Overloading caffeine early
• Ignoring hydration completely
• Using only sports drink and no real carbohydrate plan

That last one catches people constantly.

Sports drinks help. Absolutely. But unless you’re consuming large amounts consistently, they usually don’t provide enough carbohydrates alone for marathon-level effort.

Here’s what most guides won’t say: overfueling can feel almost identical to underfueling at first. Heavy legs. Sluggish pace. Mild nausea. That’s why practicing exact timing matters so much.

Think of fueling like seasoning pasta water. Too little salt and everything tastes flat. Too much and the whole meal becomes hard to swallow. Marathon nutrition works the same way.

One issue I see especially with newer runners is panic-fueling after hitting a rough patch. They’ll suddenly take two gels within ten minutes trying to “catch up.” Unfortunately, the stomach doesn’t process carbohydrates instantly. That’s like trying to cram an entire dinner into the oven after guests already arrived.

If you’re dialing in broader race prep too, matching nutrition practice with a proper marathon tapering guide can prevent a lot of late-training mistakes.

Why Copying Elite Runner Nutrition Usually Backfires

Okay, so this one deserves honesty.

Elite marathoners are fascinating to watch, but copying their fueling plans rarely works for recreational runners. Different pace. Different training load. Different gut adaptation.

A pro marathoner running 2:08 pace absorbs carbohydrates under conditions most everyday runners will never experience physically. Their digestive system is trained at a completely different level.

Yet runners still copy elite setups all the time because it feels reassuring. If the pros use six caffeinated gels and double-carb drinks, that must be the best approach, right?

Not necessarily.

Real talk: a safer fueling plan you can actually tolerate beats an aggressive “optimal” strategy that wrecks your stomach.

This is especially true for runners managing travel stress, poor sleep, or nerves before destination races like New York. Between early wakeups, crowded transportation, and race anxiety, digestion already takes a hit. That’s why practical prep guides like the NYC Marathon travel guide and NYC public transportation marathon weekend tips matter more than people think.

Best Energy Gels for Hot Weather Marathons

Heat changes everything.

Your stomach empties slower. Hydration needs increase. Sweet flavors become harder to tolerate. And suddenly the gel you loved during cool spring runs feels awful halfway through a humid race.

For hotter conditions, thinner and lighter-tasting marathon fueling products usually perform better. That’s where SiS gels shine. Their thinner consistency makes swallowing easier when breathing hard in high temperatures.

Maurten still performs well too, especially because the neutral flavor doesn’t become overwhelmingly sweet late into hot races.

One underrated trick? Alternate water-only aid stations with gel intake instead of stacking sports drink plus gels together every time.

That combination overloads sweetness fast.

If you’re training through summer conditions, adjusting recovery and hydration habits becomes critical. Articles covering best electrolyte supplements for marathon runners and cold weather versus hot weather running gear help runners adapt far more comfortably between seasons.

Are “Natural” Endurance Gels Actually Better?

Short answer: sometimes. But not automatically.

Natural gels made with ingredients like honey, maple syrup, or fruit puree can feel easier mentally for runners who dislike artificial flavors. Honey Stinger is a good example. The flavor profile feels more like real food compared to ultra-processed candy-style gels.

But here’s the nuance most people miss.

Natural ingredients do not magically make digestion easier during intense endurance exercise.

In fact, some natural products contain extra fibers or ingredients that slow digestion slightly — not ideal when your body needs quick carbohydrate absorption.

Fair warning: the answer might surprise you. Some of the simplest, most processed gels actually perform best under marathon conditions because they’re designed specifically for rapid absorption.

According to research summarized on Wikipedia’s sports nutrition overview, endurance fueling products are intentionally engineered around carbohydrate delivery efficiency rather than ingredient “purity.”

And honestly, during mile 22, your stomach cares way more about absorption than ingredient philosophy.

That said, taste preference still matters. If a runner genuinely enjoys a natural gel more, they’ll probably fuel more consistently overall. That’s a legit advantage.

What to Pair With Energy Gels for Marathon Running

Energy gels alone aren’t the full system.

The runners who handle marathons best usually combine gels with:

• Water timing
• Electrolytes
• Pre-race carbohydrate loading
• Smart pacing
• Recovery nutrition afterward

No single gel fixes poor preparation.

One thing I strongly recommend is practicing your exact pre-race breakfast alongside your fueling schedule. A lot of runners treat breakfast and in-race nutrition separately when they’re really part of the same energy chain.

That’s why resources covering carb loading before the NYC Marathon and pre-run breakfast ideas for marathon runners matter just as much as the gels themselves.

And don’t ignore recovery either.

A marathon can leave muscles feeling like somebody took a rolling pin to your legs. Pairing post-race nutrition with guides like protein recovery drinks for marathon runners and best supplements for faster marathon recovery helps runners bounce back way faster after hard efforts.

Hydration Timing Most Runners Ignore

Here’s the thing. Hydration isn’t just about quantity. Timing changes everything.

Many runners wait until they’re thirsty before drinking. By then, they’re already playing catch-up.

A smarter strategy is taking small amounts consistently throughout the race, especially when using thicker gels like GU. Large water dumps every few miles can leave your stomach sloshing around uncomfortably.

And yeah, this matters more during crowded marathons where aid station access gets messy.

If you’re carrying your own fluids, using one of these marathon running backpacks can simplify fueling logistics massively during long races or training runs.

How to Practice Marathon Fueling During Training Runs

This is where good fueling plans become race-day confidence instead of random hope.

The best long-run fueling sessions usually include:

Training Run Type	Fueling Goal
Easy long run	Test stomach tolerance
Marathon pace run	Practice carb timing
Hot-weather run	Adjust hydration strategy
Fast finish long run	Simulate late-race fatigue

Notice something?

Every run has a purpose beyond just “taking gels.”

One of my favorite marathon prep sessions is a fast-finish long run where runners take gels exactly on race schedule while gradually increasing pace near the end. That’s where digestion problems usually show up honestly.

Spoiler: if your fueling plan survives mile 18 of a hard training run, race day gets way less stressful mentally.

I also tell runners to practice carrying gels exactly how they’ll carry them during the marathon. Waist belt. Pocket. Handheld. Doesn’t matter. Just practice it.

Because fumbling with sticky wrappers at mile 20 while exhausted? Been there, done that.

If you’re building a complete race setup, pairing fueling practice with gear testing from guides like best GPS running watches for marathoners and marathon gear checklist for NYC runners helps eliminate a ton of avoidable race-day chaos.

Frequently Asked Questions

How often should I take energy gels during a marathon?

Most runners do well taking a gel every 30 to 40 minutes, depending on pace and carbohydrate needs. Faster runners usually need slightly more fuel because intensity burns through glycogen quicker. The key is consistency. Waiting until you’re exhausted usually means you’ve already fallen behind nutritionally.

Can energy gels upset your stomach during a marathon?

Absolutely, and honestly, most people get this wrong. The issue usually isn’t the gel itself — it’s taking too much too fast, skipping water, or never practicing during training. Nine times out of ten, stomach problems improve when runners rehearse their exact fueling schedule during long runs instead of improvising on race day.

Which energy gels are easiest on the stomach?

Maurten Gel 100 is widely considered one of the gentlest options because of its hydrogel texture and lower sweetness profile. SiS gels also tend to sit comfortably for runners who dislike thick textures. That said, personal tolerance varies a lot, so testing different marathon fueling products during training matters more than online hype.

Do I need caffeine in my marathon gels?

Short answer: yes, for many runners it helps. But here’s the nuance. Caffeine can improve focus and reduce perceived effort late in races, yet too much too early may cause jitters or stomach discomfort. A lot of marathoners do best saving caffeinated gels for the second half of the race, usually after mile 14 to 18.

How many gels should I carry for a full marathon?

Okay so this one depends on a few things — mainly your pace and carb target. Most marathoners carry between 4 and 8 gels total. If you’re racing longer than four hours, you’ll usually need more consistent intake because total energy demand rises significantly over time.

Are expensive marathon fueling products really worth it?

Sometimes yes. Sometimes not worth the hype. Premium gels like Maurten often shine for runners with sensitive stomachs or aggressive race goals, while budget-friendly options like GU work perfectly well for plenty of marathoners. The best energy gels for marathon running are the ones your body tolerates consistently under race conditions.

Should I take gels with water or sports drink?

Water is usually the safer pairing, especially with thicker gels. Combining super-sweet sports drinks plus concentrated gels can overwhelm your stomach late in races. If you’re using on-course sports drink, practice that exact combination during training first instead of assuming it’ll work automatically.

Your Move

Here’s the thing most runners eventually learn the hard way: the “perfect” gel matters less than building a fueling strategy you trust completely under fatigue.

Confidence changes everything late in a marathon.

When your legs hurt, crowds thin out, and pace starts slipping, you don’t want to wonder whether your nutrition plan will hold together. You want something familiar. Practiced. Predictable.

So start simple.

Pick one or two energy gels for marathon running that genuinely feel comfortable during long runs. Practice your timing. Adjust slowly. Pay attention to what your stomach tells you instead of chasing whatever product social media suddenly decided is magical this month.

Because honestly? The runners who fuel consistently usually outperform the runners who fuel perfectly on paper.

And if you’ve found a gel setup that totally changed your marathon experience — good or bad — share it in the comments. Somebody else is probably dealing with the exact same issue right now.