Affiliate Disclosure: Some links in this article are affiliate links. If you purchase through them, the site earns a small commission at no extra cost to you. Gel rankings are determined by normalized data (price per 30 g of carbohydrate, sodium content, carb ratio) and are independent of any affiliate relationship.
Most "best gel" lists pick a winner based on brand familiarity or whatever the author trained with last. This comparison uses one normalized metric: cost per 30 g of carbohydrate delivered. That primary sort key is layered with sodium load, caffeine availability, carbohydrate ratio, and pro-athlete adoption to build a category-winner framework for every type of marathon runner.
The 2026 update reflects current retail pricing (USD), updated product formulations from 226ERS, Precision Fuel & Hydration, and Science in Sport, and expanded carbohydrate research supporting higher per-hour targets for trained runners.
Methodology: 34 gels were sourced from the endurance-nutrition brand cluster. Discontinued SKUs were excluded. Price-per-30 g-carb is the primary ranking column and is calculated as: (retail price ÷ carbs per gel) × 30. All figures are in USD at April 2026 retail.
Top Picks by Category
Best Overall — Maurten Gel 160
40 g carbs · 0.8:1 fructose:glucose ratio · 40 mg sodium · $4.90 per gel · $3.68/30 g carb
Texture & format: Firm, flavorless hydrogel in a 65 g sachet. No water required. Opaque white packaging; the gel exits in a single cohesive squeeze. Best for athletes who hit flavor fatigue by kilometer 25.
Maurten's Gel 160 ranks near the bottom of the value table. It wins the overall category because of what it delivers for elite-pace runners: the highest single-gel carbohydrate load in the hydrogel category (40 g), a patented alginate matrix that reduces GI distress at high intensities, and the deepest pro adoption of any gel on the market. Eliud Kipchoge, Tigst Assefa, and the majority of the Abbott World Marathon Majors podium field have used Maurten products in competition.
For runners targeting sub-3:30, the case is straightforward: at 60–90 g of carbs per hour, Maurten Gel 160 means fewer gels to carry and fewer moments of fumbling wrappers. For budget-conscious age-groupers, the per-30 g cost of $3.68 is hard to justify when alternatives exist at under $2.00.
Best Value — Carbs Fuel Original and Näak Ultra Energy Gel
Carbs Fuel Original: 50 g carbs · 100 mg sodium · $2.50 per gel · $1.50/30 g carb Näak Ultra Energy Gel: 40 g carbs · 2:1 ratio · 100 mg sodium · $2.10 per gel · $1.58/30 g carb
Texture & format (Carbs Fuel Original): 100 g serving size, large pouch with a wide-mouth tear notch. Syrupy consistency, single-flavor range. The high volume is deliberate — 50 g of carbohydrate demands it — but the large sachet bulk and monotone flavor become a factor at the four-hour mark.
Texture & format (Näak Ultra Energy Gel): 50 g sachet, slightly firmer than standard gels. Mild sweetness at six flavor options. The cricket-protein note is subtle but present; flavor-sensitive runners should test in training first.
Carbs Fuel Original wins the value ranking outright at $1.50 per 30 g of carbohydrate, the cheapest normalized price in the full dataset. It carries 50 g of carbs per gel and 100 mg of sodium, making it genuinely useful for high-sweat runners rather than merely budget-seekers. The limitations: three flavor options only, and no published carb-ratio data, suggesting a single-source (likely maltodextrin) formulation rather than a blended 2:1 glucose-fructose mix.
Näak Ultra Energy Gel finishes second at $1.58/30 g with a cleaner nutritional profile: confirmed 2:1 ratio, 40 g carbs, 100 mg sodium, and six flavors. For runners training at high volume who go through 4–6 gels per long run, the savings against a premium gel compound meaningfully across a training block.
226ERS High Energy Gel deserves mention at $1.40/30 g carb ($1.87/gel, 40 g carbs, 2:1 ratio): the best value of all products with published carb-ratio data, though the brand has lower availability outside Europe.
Best for Heavy Sweaters — Huma Plus and Precision Fuel PF 30
Huma Plus: 38 g carbs · 250 mg sodium · $2.50 per gel Precision Fuel PF 30: 30 g carbs · 2:1 ratio · 100 mg sodium · $3.00 per gel
Texture & format (Huma Plus): Thick, chia-seed-studded puree in a 46 g pouch. Noticeably chunkier than maltodextrin gels; the seed texture divides opinion sharply. Real-fruit flavor (raspberry, strawberry, chocolate) comes through clearly. Requires chewing slightly for full evacuation.
Texture & format (Precision Fuel PF 30): Thin isotonic liquid in a 60 ml sachet — more like a concentrated drink than a traditional gel. Can be taken without water. The sachet is bulkier than Maurten but ejects cleanly in one-handed use.
Sodium loss during a marathon is highly individual but averages 400–1,200 mg per hour in warm conditions. For runners at the high end of that range (visible salt crust on skin, cramping history, high sweat volume), sodium from gels becomes a meaningful input.
Huma Plus leads the field at 250 mg of sodium per gel, the highest of any product in this dataset. That is roughly a third of average hourly sodium loss in warm conditions delivered per gel. The chia-seed base also adds a small fat and protein contribution, which suits ultra-distance runners but is mostly irrelevant for marathon pace.
Precision Fuel PF 30 offers 100 mg sodium with an isotonic formulation designed to be taken without water, and a documented 2:1 glucose-fructose ratio. At $3.00 per 30 g-carb equivalent, it is priced at the upper-mid tier. The isotonic format eliminates the water-dependency that standard gels require, which matters at late-race aid stations when coordination drops.
Spring Energy Long Haul (54 g carbs, 175 mg sodium) is worth noting for ultra runners in this category, though its real-food texture makes it impractical at marathon pace.
Best for Caffeine-Timed Fueling — GU Roctane and Maurten Gel 100 Caf 100
GU Roctane: 21 g carbs · 2:1 ratio · 35 mg caffeine · 125 mg sodium · $2.50 per gel · $3.57/30 g carb Maurten Gel 100 Caf 100: 25 g carbs · 0.8:1 ratio · 100 mg caffeine · 40 mg sodium · $3.90 per gel · $4.68/30 g carb
Texture & format (GU Roctane): Standard 32 g sachet, similar viscosity to original GU gels. Wide flavor range including tropical fruit and chocolate coconut. The 12-flavor lineup is the most practical defense against flavor fatigue across a full training block.
Texture & format (Maurten Gel 100 Caf 100): Identical to the standard Gel 100 — firm, flavorless hydrogel in a 40 g sachet. The 100 mg caffeine load is invisible in texture and taste. One decisive sachet at km 30; nothing distributed.
Research consistently shows caffeine improves endurance performance by 2–4% at doses of 3–6 mg/kg body weight. For a 70 kg runner, that is 210–420 mg over the race, or roughly 2–6 caffeinated gels depending on concentration. Note: 3–6 mg/kg is a population guideline; caffeine-sensitive individuals, those on medications, or athletes with a history of cardiac arrhythmia should start at the lower end or consult a clinician before race-day use.
The strategic approach used by elite marathon runners is caffeination timing: one standard gel every 20–30 minutes, with caffeinated gels placed at pre-planned pain points. Typically that means km 25–30, where the physiological difficulty of the marathon spikes.
GU Roctane delivers 35 mg of caffeine per gel: a modest dose that suits runners using multiple caffeinated gels across the race without exceeding comfortable caffeine thresholds. Its 125 mg sodium is the highest in the GU lineup, making it the logical choice for warm-weather marathons. The 12 available flavors provide practical coverage across long training blocks where flavor fatigue becomes a real dropout factor.
Maurten Gel 100 Caf 100 delivers 100 mg of caffeine in a single gel, a high-impact dose designed for one decisive pre-race or mid-race deployment. The premium per-30 g cost ($4.68) reflects both the hydrogel technology and the caffeine concentration. Athletes who respond strongly to caffeine and want a single decisive hit at km 30 find this formulation effective. Those who prefer distributed caffeine loading favor GU Roctane's repeated lower-dose approach.
Best Science-Backed Carb Ratio — SIS Beta Fuel Gel and Neversecond C30
SIS Beta Fuel Gel: 40 g carbs · 1:0.8 glucose:fructose ratio · 100 mg sodium · $2.88 per gel · $2.16/30 g carb Neversecond C30 Energy Gel: 30 g carbs · 1:0.8 glucose:fructose ratio · 95 mg sodium · $2.75 per gel · $2.75/30 g carb
Texture & format (SIS Beta Fuel Gel): Thin isotonic liquid in a 60 ml sachet — noticeably bulkier and heavier than the 40 g Maurten sachets. Three flavor options (Orange, Strawberry, Lemon-Lime). The larger format is workable in jersey pockets but awkward in a race bib or minimalist vest.
Texture & format (Neversecond C30): 50 g sachet, gel-like consistency closer to traditional formats. Three flavors; the Lemon flavor is reliably tolerated late in race conditions where sweetness tolerance drops.
The 1:0.8 glucose-to-fructose ratio used by SIS and Neversecond is derived from intestinal co-transporter research. Glucose is absorbed via SGLT1 transporters; fructose via GLUT5. Using both transporters in the right proportion allows trained athletes to absorb up to 90 g of carbohydrate per hour, approximately 30% more than possible with glucose alone. The 2:1 ratio used by many older gels was the original dual-transporter formulation; 1:0.8 is the research-optimized refinement now used by sports science product teams.
SIS Beta Fuel Gel at $2.16/30 g carb is the best value among confirmed dual-transporter gels. It is the fuel of choice for several professional cycling teams and has documented use in Tour de France competition. The 40 g carbohydrate load means two gels per hour reaches 80 g, within the upper range for trained marathon runners.
Neversecond C30 ($2.75/30 g carb) uses the same 1:0.8 ratio with 95 mg sodium per gel. Used by the Visma–Lease a Bike WorldTour team and multiple Ironman World Championship podium finishers, it is the reference point for evidence-based fueling in professional cycling. For marathon runners, its isotonic-adjacent design makes it easy to take at marathon-pace effort without mandatory water.
Full Comparison Table
All gels sorted by price per 30 g of carbohydrate (ascending). Gels without pricing data are listed separately below.
| Brand | Product | Carbs (g) | Ratio | Sodium (mg) | Caffeine (mg) | Sachet size | Price | $/30 g carb |
|---|---|---|---|---|---|---|---|---|
| 226ERS | High Energy Gel | 40 | 2:1 | 100 | 0 | 76 g | $1.87 | $1.40 |
| Carbs Fuel | Original Gel | 50 | — | 100 | 0 | 100 g | $2.50 | $1.50 |
| Näak | Ultra Energy Gel | 40 | 2:1 | 100 | 0 | 50 g | $2.10 | $1.58 |
| Huma | Huma Plus | 38 | — | 250 | 0 | 46 g | $2.50 | $1.97 |
| Spring Energy | Awesome Sauce | 45 | — | 65 | 0 | 75 g | $3.00 | $2.00 |
| Science in Sport | Beta Fuel Gel | 40 | 1:0.8 | 100 | 0 | 60 ml | $2.88 | $2.16 |
| Hammer Nutrition | Hammer Gel | 22 | — | 25 | 0 | 33 g | $1.55 | $2.11 |
| Spring Energy | Long Haul | 54 | — | 175 | 0 | 95 g | $4.00 | $2.22 |
| Amacx | Iso-Gel | 35 | 1:0.8 | 80 | 0 | 60 ml | $2.75 | $2.36 |
| GU Energy Labs | Energy Gel | 22 | 2:1 | 60 | 0 | 32 g | $1.80 | $2.45 |
| Clif Bar | Clif Shot | 22 | — | 90 | 0 | 34 g | $1.80 | $2.45 |
| Huma | Huma Original | 22 | — | 40 | 0 | 39 g | $1.85 | $2.52 |
| High5 | Energy Gel Aqua | 22 | — | 65 | 0 | 66 ml | $1.88 | $2.56 |
| Neversecond | C30 Energy Gel | 30 | 1:0.8 | 95 | 0 | 50 g | $2.75 | $2.75 |
| Precision Fuel & Hydration | PF 30 Gel | 30 | 2:1 | 100 | 0 | 60 ml | $3.00 | $3.00 |
| Precision Fuel & Hydration | PF 90 Gel | 90 | 2:1 | 300 | 0 | 180 g | $9.00 | $3.00 |
| Neversecond | C30+ (caffeinated) | 30 | 1:0.8 | 95 | 75 | 50 g | $3.00 | $3.00 |
| Gatorade Endurance | Endurance Energy Gel | 20 | — | 90 | 0 | 32 g | $2.00 | $3.00 |
| Science in Sport | GO Isotonic | 22 | — | 10 | 0 | 60 ml | $2.25 | $3.07 |
| Spring Energy | PowerRush | 25 | — | 55 | 100 | 45 g | $2.75 | $3.30 |
| Spring Energy | Canaberry | 25 | — | 75 | 0 | 45 g | $2.75 | $3.30 |
| TORQ | TORQ Gel | 18 | 2:1 | 38 | 0 | 45 g | $2.13 | $3.55 |
| GU Energy Labs | Roctane | 21 | 2:1 | 125 | 35 | 32 g | $2.50 | $3.57 |
| Maurten | Gel 160 | 40 | 0.8:1 | 40 | 0 | 65 g | $4.90 | $3.68 |
| UCAN | Edge Gel | 20 | — | 50 | 0 | 47 g | $3.00 | $4.50 |
| Maurten | Gel 100 | 25 | 0.8:1 | 40 | 0 | 40 g | $3.90 | $4.68 |
| Maurten | Gel 100 Caf 100 | 25 | 0.8:1 | 40 | 100 | 40 g | $3.90 | $4.68 |
| First Endurance | Liquid Shot (flask) | 25 | — | — | — | 150 ml flask | $5.00 | $6.00 |
Products without current retail pricing (excluded from rank): Styrkr GEL 40 (40 g, 2:1), Veloforte Doppio (25 g, 75 mg caffeine), High5 Slow Release (23 g), Dextro Energy Liquid Gel (25 g), Probiótica Endurance Gel (22 g).
Note: The PF 90 Gel is designed for bike pockets or vest carriers, not hand-carry race fueling. $/30 g carb parity with PF 30 confirms consistent Precision Fuel pricing across formats.
How to Pick for Your Marathon
By finish-time target:
- Sub-3:00 (elite/high-AG): Target 75–90 g carbs/hour. At this pace, GI stress risk rises sharply; Maurten's hydrogel matrix or isotonic formats (SIS Beta Fuel, Neversecond C30) reduce distress. Budget is secondary to formulation quality.
- 3:00–3:45 (competitive age-grouper): 60–75 g/hour is achievable. Value-tier gels with 2:1 ratios (226ERS, Näak, GU Energy Gel) perform identically to premium options at half the cost.
- 3:45–4:30 (recreational): 45–60 g/hour. Flavor variety matters more. At this pace you will take 4–6 gels and flavor fatigue is real. GU Energy Gel (20 flavors) and GU Roctane (12 flavors) lead on choice.
- 4:30+ (first-timer, walk/run): 30–45 g/hour. Focus on tolerability: real-food formats (Huma Original, Spring Energy) or lower-carb gels suit athletes who do not have trained gut absorption for high-carb intake.
By weather and sweat rate:
Hot weather (>22°C race temperature) or high sweat rate runners should prioritize sodium per gel. Huma Plus (250 mg), GU Roctane (125 mg), and Precision Fuel PF 30 (100 mg) lead on electrolyte replacement from gel alone. At high sweat rates, gels do not replace sodium fast enough; a separate electrolyte tablet or high-sodium drink is needed alongside.
By GI history:
Athletes with a history of GI distress in races should look at isotonic or hydrogel formulations first. Non-isotonic gels require water co-ingestion; taking them without water can draw water into the gut, worsening distress. Isotonic options that can be taken without mandatory water: SIS Beta Fuel Gel, Neversecond C30, SIS GO Isotonic, Amacx Iso-Gel, Precision Fuel PF 30.
By budget:
A 4-hour marathon with gels every 25 minutes requires approximately 10 gels per race. The budget difference between the cheapest confirmed-ratio gel (226ERS at $1.87) and the most expensive (Maurten Gel 100 Caf 100 at $3.90) is $20 per race, which compounds to several hundred dollars across a full training block. Choosing based on normalized price-per-carb rather than brand recognition is the highest-leverage budget decision in marathon nutrition.
What the Pros Use in 2025–26
Maurten dominates the marathon podium. Eliud Kipchoge's sub-2:00 Breaking2 project was the first high-profile showcase of hydrogel technology, and Maurten has since become the reference fuel for elite marathon and ultra-distance racing. The majority of Abbott World Marathon Majors winners from 2023–2025 raced on Maurten Gel 100 or Gel 160 combinations, with Maurten Caf 100 deployed at the 30–35 km pain point.
Science in Sport (SIS) fuels professional cycling. The Beta Fuel gel line, using the 1:0.8 glucose-fructose ratio, is the race fuel of several WorldTour teams and was the dominant gel seen at the Tour de France 2024 and 2025 peloton feed zones. Cycling's per-hour carbohydrate requirements (90–120 g/hr) are higher than marathon running, making SIS Beta Fuel the most stress-tested high-carb gel on the market.
Neversecond C30 fuels the professional triathlon circuit. The Visma–Lease a Bike team (Jumbo-Visma) adopted Neversecond as their official nutrition partner. Multiple Ironman World Championship age-group podium finishers have publicly documented C30 use. The 1:0.8 ratio and isotonic-adjacent design make it the preferred choice for athletes who need race nutrition to survive multi-hour efforts in heat without water dependency.
The practical takeaway for age-groupers: the formulation differences that elite athletes use (dual-transporter ratios, hydrogel technology, isotonic design) are available in the same consumer products. The performance gap is in gut training, pacing, and execution, not product access.
Carb-Per-Hour Target: What the Research Says
The limiting factor in high-carbohydrate fueling is intestinal absorption, not stomach capacity. The SGLT1 transporter (glucose) and GLUT5 transporter (fructose) are independent pathways. When both are used simultaneously through glucose-fructose blended gels, trained athletes can absorb:
- 60 g/hour: Achievable with single-transporter (maltodextrin-only) gels; ceiling for most untrained absorbers
- 75–80 g/hour: Achievable with 2:1 ratio gels in athletes who have practiced high-carb fueling in training
- 90 g/hour: Documented in research with 1:0.8 ratio gels in athletes with gut training; upper limit for oral absorption
- 100–120 g/hour: Documented in elite cycling but not reliably achievable in running due to GI stress from impact
Marathon running vs. cycling: The vertical impact of running significantly increases GI distress risk at high carbohydrate intake. Most sports dietitians recommend staying at 60–75 g/hour for marathon runners, even those who can handle 90 g/hour on the bike. Starting conservative in training and building toward race-day targets over 8–12 weeks of gut training is the evidence-based approach. See carbohydrate intake targets for endurance runners for a full breakdown of research-derived per-hour targets by pace and finish time.
Use the TDEE & Macro Planner to calculate your race-day carbohydrate requirement based on finish time, body weight, and intensity. The planner outputs per-hour carbohydrate targets and can be used to design your gel schedule.
Frequently Asked Questions
What are the best gels for a marathon?
The best gel depends on the runner's pace, sweat rate, GI history, and budget. For overall performance at elite and sub-elite pace, Maurten Gel 160 has the strongest pro adoption and largest single-gel carbohydrate load. For value with a confirmed dual-transporter ratio, SIS Beta Fuel Gel ($2.16/30 g carb) and Näak Ultra Energy Gel ($1.58/30 g carb) cover the same physiological bases at lower cost. The ranking in this article normalizes all 28 priced gels to a common metric (price per 30 g of carbohydrate) so runners can compare across brand marketing.
What is the best gel to use for a marathon?
No single gel is optimal for all runners. Runners with sensitive stomachs should prioritize isotonic or hydrogel formulations (Maurten, SIS Beta Fuel, Neversecond C30, Precision Fuel PF 30). Runners in hot conditions should prioritize high sodium (Huma Plus at 250 mg, GU Roctane at 125 mg). Budget-focused runners get the best carbohydrate value from Carbs Fuel Original ($1.50/30 g carb) or 226ERS High Energy Gel ($1.40/30 g carb). Runners targeting 75+ g carbs per hour should use confirmed 2:1 or 1:0.8 ratio gels only.
What is the 10-10-10 rule for marathons?
The 10-10-10 rule is a common informal fueling heuristic: take one gel at the 10-mile mark, another at mile 20, and a third at mile 30 (for longer ultra distances). For standard marathon fueling, sports dietitians generally recommend starting at 30–40 minutes into the race rather than waiting for miles 10. Beginning fueling before glycogen depletion sets in is more effective than trying to catch up later.
Are energy gels okay for diabetics?
Energy gels cause rapid blood glucose spikes due to fast-absorbing carbohydrates. For Type 1 diabetics running marathons, gel timing must be coordinated with insulin management, typically requiring adjusted basal rates and careful monitoring. Gels based on slower-digesting carbohydrate sources (UCAN Edge Gel uses starch) or mixed real-food formats (Huma, Spring Energy) produce lower glucose spikes than pure maltodextrin gels. Any diabetic athlete using gels in training or racing should work with an endocrinologist who understands endurance sports fueling.
How many gels do you need for a marathon?
At 60 g of carbohydrate per hour and a 3:30 finish time, a runner needs approximately 210 g of carbohydrate from gels (about 5–6 standard gels at 22 g carbs each, or 4–5 high-carb gels at 40 g carbs each). At 75 g/hour over 4:00, that is 300 g total, or roughly 7–8 standard gels. Runners using high-carb gels (Carbs Fuel Original at 50 g, Maurten Gel 160 at 40 g) carry fewer gels for the same fueling target. Calculate your exact gel count by dividing your target carbohydrate intake (g/hour × race time in hours) by the carbs per gel.
Is it better to use gels with or without caffeine?
Caffeine improves marathon performance at 3–6 mg/kg body weight, with the effect peaking 45–90 minutes after ingestion. Most runners benefit from a mixed strategy: standard gels for regular carbohydrate delivery, caffeinated gels timed to the hardest portion of the race (typically km 28–35). Using caffeinated gels throughout the race can lead to GI distress or excessive total caffeine intake. If caffeine is not used in training, it should not be introduced on race day.
Which gel performs best in head-to-head comparisons?
For Maurten versus Science in Sport, see the Maurten vs SIS Beta Fuel comparison for a side-by-side breakdown of hydrogel vs standard dual-transporter formulations. For isotonic performance, the Maurten vs Precision Fuel comparison covers the hydrogel vs isotonic trade-off at race intensity.
Race-Day Logistics — Total fuel mass for a marathon at 60 g/hr x 4 hours = 240 g of carbohydrates.
- 10x Maurten Gel 100 (400 g total sachet mass) — standard load; fits two jersey pockets or a four-pocket vest
- 6x Maurten Gel 160 (390 g total) — leaner touchpoint count, same carb delivery; preferred for runners who fumble wrappers in the final 10 km
- 6x SIS Beta Fuel Gel (360 ml total) — liquid format is bulkier per carb gram; may overflow standard race-bib pockets
- 5x Carbs Fuel Original (500 g total) — high carb per gel means fewer gels, but the large pouches demand a vest or hydration pack
- 1 x Maurten Drink Mix 320 (single 500 ml bottle, 80 g carbs) supplemented with 2x Maurten Gel 100 covers 4 hours at 60 g/hr with no gel fiddling past km 30
Pick based on what you can carry reliably, not just what you can stomach.
Field Notes — For first-person race-day usage and protocols at age-grouper level, see Thomas Prommer's POV pieces on prommer.net: 120g/hr: Gold Standard or Gimmick? (n=1 protocol at 90/105/120 g/hr) and Hydrogel: What the Studies Really Say.
For the Spring Energy products in this comparison, see also The Spring Energy Calorie Saga for the QC backstory.
References
- Jeukendrup, A.E. (2014). "A step towards personalized sports nutrition: carbohydrate intake during exercise." Sports Medicine, 44(Suppl 1), 25–33.
- Currell, K., & Jeukendrup, A.E. (2008). "Superior endurance performance with ingestion of multiple transportable carbohydrates." Medicine & Science in Sports & Exercise, 40(2), 275–281.
- Burke, L.M. et al. (2011). "Carbohydrates for training and competition." Journal of Sports Sciences, 29(Suppl 1), S17–S27.
- Pöchmüller, M. et al. (2016). "A systematic review and meta-analysis of carbohydrate benefits associated with randomized controlled competition-based performance trials." Journal of the International Society of Sports Nutrition, 13, 27.
- Stellingwerff, T. & Cox, G.R. (2014). "Systematic review: carbohydrate supplementation on exercise performance or capacity of varying durations." Applied Physiology, Nutrition, and Metabolism, 39(9), 998–1011.