By Lauren HollandUpdated November 2026
Choosing the best energy gels for running in the UK comes down to a few practical questions: how easily your stomach handles them, whether they suit your training or racing pace, and whether the flavour and texture stay appealing after the tenth gel of the season. The five products below were selected by reviewing manufacturer specifications, brand reputation and the patterns runners commonly describe in owner feedback. Our criteria were carbohydrate delivery, stomach tolerance, caffeine and electrolyte content, dietary suitability and how well each product fits different distances and training styles. Nothing here reflects personal testing.
Our top picks at a glance
- 1
TOP CHOICEBest overallHoney Stinger Organic Fruit Smoothie Energy GelView on Amazon - 2
TOP CHOICEBest for sensitive stomachsDouble Electrolytes Real Food Energy Gel Variety PackView on Amazon - 3
TOP CHOICEBest for caffeine-free fuellingUCAN Energy Gel Variety PackView on Amazon - 4
Best for classic flavourGU Energy Original Energy Gels Raspberry LemonadeView on Amazon - 5
Best for electrolyte replacementWorkout Gels with Magnesium, Sea Salt and PotassiumView on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| Honey Stinger Organic Fruit Smoothie Energy Gel | Everyday training and race day | Gluten free and caffeine free |
| GU Energy Original Energy Gels Raspberry Lemonade | Runners who like a familiar gel texture | Classic high-carb gel format |
| Double Electrolytes Real Food Energy Gel Variety Pack | Runners with sensitive stomachs | Chia-based, real food ingredients |
| UCAN Energy Gel Variety Pack | Runners avoiding sugar spikes | Sugar free, slow-release energy |
| Workout Gels with Magnesium, Sea Salt and Potassium | Hot weather and long sessions | Built-in electrolytes |
Honey Stinger Organic Fruit Smoothie Energy Gel
Honey Stinger, Organic Fruit Smoothie Energy Gel, Gluten Free & Caffeine Free, for Exercise, Running and Performance, Sports Nutrition for Home & Gym, Pre and Mid Workout, 12 Pack, 13.2 Ounce
Best for: Everyday training and race day fuelling with a gentle, fruit-forward flavour
This suits runners who want a natural-tasting gel that works across training runs, long sessions and half or full marathon racing. It is a popular choice for those who find sharper, sweeter gels hard to finish.
Key specs
- Gluten free and caffeine free
- Sold as a 12 pack, 13.2 ounce total
- Marketed for pre- and mid-workout use
Pros
- Fruit smoothie flavour many runners find easier to tolerate
- Caffeine free, so it suits evening runs and caffeine-sensitive athletes
- Pack size works well for a full training block
Cons
- Texture can feel thinner than some runners expect
- Caffeine free means you will need a separate source if you want a stimulant boost
Bottom line: A strong all-round option for runners who want a natural flavour and a caffeine-free gel for training and racing.
GU Energy Original Energy Gels Raspberry Lemonade
GU Energy, Original Energy Gels, Raspberry Lemonade – 8 Count
Best for: Runners who want a familiar, high-carbohydrate gel in a classic format
GU is one of the best-known gel brands in endurance sport, and this flavour suits runners who already know how their stomach responds to the standard GU texture. It is a practical choice for race day when you want a proven format.
Key specs
- Original energy gel format
- Raspberry Lemonade flavour
- Sold as an 8 count pack
Pros
- Widely used format that many runners already trust
- Flavour is light and easy to finish on a long run
- Smaller pack lets you try it before committing to a larger order
Cons
- Smaller count means more frequent reordering for high-volume training
- Sweeter profile may not suit runners who prefer savoury or fruit-led flavours
Bottom line: A reliable pick for runners who value a tried-and-tested gel format and want a light, citrus-style flavour for race preparation.
Double Electrolytes Real Food Energy Gel Variety Pack
Double Electrolytes, Real Food, Stomach Friendly Energy, 6 Original and 6 Plus Gels Huma Plus – Chia Energy Gel, Original and Plus Variety 12ct
Best for: Runners with sensitive stomachs who prefer real food ingredients
This variety pack is aimed at runners who find conventional gels too thick or sugary. The chia-based formulation and the original and plus variants give you a choice of carbohydrate and nutrient profiles across a training block.
Key specs
- Chia energy gel base
- Original and Plus variety, 12 count
- Marketed as stomach friendly, real food energy
Pros
- Real food positioning appeals to runners avoiding artificial ingredients
- Variety pack lets you compare Original and Plus across sessions
- Often described by owners as gentle on the stomach during hard efforts
Cons
- Texture and consistency differ from traditional gels, which takes adjustment
- Flavour profile is less sweet, so it may not suit those who prefer a sugary hit
Bottom line: A good choice if conventional gels upset your stomach and you want a real food alternative with a variety of options.
UCAN Energy Gel Variety Pack
Easy on the Stomach | No Sugar Crash | Ideal for Running, Cycling and other Endurance Training | Vegan Gluten Free Non-GMO UCAN Energy Gel | Variety Pack | 4 Flavors | Sugar Free | 12 Pack
Best for: Runners who want steady energy without a sugar spike
UCAN positions its gels around slow-release energy rather than rapid sugar delivery. This appeals to runners who have experienced energy crashes with high-sugar gels, or who are following lower-sugar nutrition plans.
Key specs
- Sugar free formulation
- Vegan, gluten free and non-GMO
- Variety pack with 4 flavours, 12 count
Pros
- Sugar free design suits runners avoiding rapid glucose swings
- Vegan and gluten free for a range of dietary needs
- Four flavours reduce palate fatigue over a long training block
Cons
- Slow-release profile may not deliver the immediate boost some racers want in the final miles
- Works best when practised in training, so it is less suited to a first-time gel user
Bottom line: Best for runners who prioritise steady energy and want a sugar-free option across long training sessions.
Workout Gels with Magnesium, Sea Salt and Potassium
Workout Gels for Gym, Running, Cycling & Hiking, Magnesium, Sea Salt & Potassium, Sports Nutrition, Gluten Free Organic Honey Energy Gel with Electrolytes, Caffeine Free, 12ct
Best for: Electrolyte replacement on hot days and long sessions
This gel adds magnesium, sea salt and potassium to a honey-based carbohydrate source. It suits runners who sweat heavily or train in warm weather, where electrolyte loss becomes a real concern on longer efforts.
Key specs
- Electrolytes: magnesium, sea salt and potassium
- Organic honey base
- Gluten free and caffeine free, 12 count
Pros
- Built-in electrolytes reduce the need for separate tablets on long runs
- Caffeine free, suitable for evening sessions
- Organic honey base appeals to runners preferring simpler ingredients
Cons
- Salty profile can be off-putting for runners who prefer sweet gels
- Electrolyte content may not suit everyone, so check against your sweat rate and hydration plan
Bottom line: A sensible choice for hot-weather training or long sessions where electrolyte loss is a concern.
Buying Guide
Carbohydrate Content and Type
Most gels deliver carbohydrate in the range that sports nutrition guidance suggests for endurance efforts, but the type matters as much as the quantity. Simple sugars give fast energy, while blends that include maltodextrin or slower-release carbohydrates spread the supply more evenly. Check the label for total carbohydrate per gel and how many you will need per hour.
Good picks for this: GU Energy Original Energy Gels Raspberry Lemonade, UCAN Energy Gel Variety Pack
Stomach Tolerance
Gut comfort is one of the most common reasons runners abandon a gel. Thicker, more concentrated formulas can cause discomfort at higher intensities. Gels with a lighter texture or real food base are often described by owners as easier to digest, though individual response varies widely.
Good picks for this: Double Electrolytes Real Food Energy Gel Variety Pack, Honey Stinger Organic Fruit Smoothie Energy Gel
Caffeine Content
Caffeine can improve perceived effort in some runners, but it can also cause jitters, stomach upset or sleep disruption. Decide whether you want a stimulant boost before choosing. Caffeine-free gels suit evening runs and anyone sensitive to stimulants, while caffeinated versions may appeal to those racing late in a marathon.
Good picks for this: Honey Stinger Organic Fruit Smoothie Energy Gel, Workout Gels with Magnesium, Sea Salt and Potassium
Electrolyte Content
Sweat rate, race temperature and session length all affect how much sodium and other electrolytes you lose. For long runs in heat, a gel with added electrolytes can simplify your plan. For cooler conditions or shorter efforts, plain carbohydrate gels are usually sufficient.
Good picks for this: Workout Gels with Magnesium, Sea Salt and Potassium, GU Energy Original Energy Gels Raspberry Lemonade
Dietary Requirements
Check for gluten, dairy, animal ingredients and added sugar if these matter to you. Many gels are labelled gluten free, but cross-contamination warnings vary, so read the packaging if you have coeliac disease. Vegan options are widely available.
Good picks for this: UCAN Energy Gel Variety Pack, Honey Stinger Organic Fruit Smoothie Energy Gel
Flavour and Texture
Flavour fatigue is a real issue on long training blocks. A variety pack reduces monotony, while a single flavour is useful if you have already found one you tolerate well. Texture ranges from thin and runny to thick and syrupy, so consider how easily you can take it on the move.
Good picks for this: Double Electrolytes Real Food Energy Gel Variety Pack, UCAN Energy Gel Variety Pack
Pack Size and Value for Training
If you train five or six days a week, you will go through gels quickly. Larger packs reduce the need for frequent reordering, while smaller packs let you test a product before committing. Compare the number of gels per pack and how many you realistically need per week.
Good picks for this: Honey Stinger Organic Fruit Smoothie Energy Gel, GU Energy Original Energy Gels Raspberry Lemonade
FAQ
How many energy gels should I take on a run?
For efforts longer than about 60 to 90 minutes, many runners take one gel every 30 to 45 minutes, depending on intensity and individual tolerance. Always practise your fuelling plan in training before race day, and speak to a registered dietitian or sports nutritionist if you have specific health needs.
Should I take an energy gel with water?
Most gels are designed to be taken with water so they dilute and digest more easily. Sip water with each gel, and avoid gulping large amounts at once, which can cause discomfort.
Are energy gels suitable for everyone?
Gels are a convenient carbohydrate source, but they are not right for everyone. If you have digestive conditions, diabetes or other health concerns, consult a doctor or registered dietitian before changing your fuelling strategy.
Can I use energy gels for shorter runs?
For runs under about 60 minutes, most people do not need gels, since normal meals and pre-run fuelling are usually enough. Gels are most useful for longer sessions and races where glycogen stores start to run low.
What is the difference between caffeinated and caffeine-free gels?
Caffeinated gels may improve alertness and perceived effort for some runners, while caffeine-free gels avoid stimulant side effects. Choose based on your sensitivity to caffeine, the time of day you train and whether you are racing late in the day.
How should I store energy gels?
Store gels in a cool, dry place away from direct sunlight, and check the best-before date on each pack. Heat can change the texture and make them harder to swallow, so avoid leaving them in a hot car or running belt for long periods.
Conclusion
The best energy gels for running in the UK depend on your stomach, your fuelling goals and the conditions you train in. Honey Stinger suits runners wanting a natural, caffeine-free gel for everyday use. GU Energy is a dependable classic for those who like a familiar format. Double Electrolytes works well for runners with sensitive stomachs who prefer real food. UCAN suits anyone wanting steady, sugar-free energy, and the electrolyte gel from Workout Gels is a sensible choice for hot or long sessions. Trial your chosen gel during training runs before relying on it for race day.
Sources
- General guidance on healthy eating, hydration and when to seek advice on diet and digestive health
- Research summaries on carbohydrate intake, exercise performance and sports nutrition (nih.gov)
- Guidance from the British Dietetic Association on sports nutrition and fuelling for endurance activity
Related reading
- Top 7 Healthy Energy Gels for Running Worth Considering in 2026
- Top 6 Marathon Running Energy Gels for Race Day Fueling
- DIY Energy Gels for Running: 6 Best Homemade Recipes and Flasks Compared
About Lauren Holland
Lauren Holland is part of our editorial team and reviews and edits our marathon & half-marathon guides, checking product details against manufacturer specifications and owner feedback.
