Save £4.95
The Training Bundle
Twenty gels, twenty sachets, nothing to run out of mid-build.
Enough for about 10 long sessions.
20 × Energy Gels, Mix Box20 × Electrolytes
£79.95£84.90 bought separately
Developed with Alistair Brownlee · Informed Sport certified
The energy gel your stomach stops noticing.
Easy on your stomach. The salt’s already inside.40g of carbs in every gel. Low Salt for outdoor sessions, High Salt for heavy sweaters and indoor.
Shop Energy Gels
Build my fuelling plan
From £0.48 per 10g carbs on the Flexible Plan
60-day guarantee, opened or not
Never been able to stomach gels?
Gel number four is where most plans fall apart: too sweet, too thick, and a stomach that votes against the plan. We built ours for that moment, not for the label.
Carbs in the gel, electrolytes in the bottle, CoreCtrl for the hottest races. Start with the gels; build from there.
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40g Carbs per gel
Flexible Plan · 30% off every delivery
40g carbs · 1:1 glucose to fructose · Low Salt 98mg or High Salt 386mg sodium
From £29.95
Not sure which? Try the Mix Box -
1g Salt per stick · 390mg sodium
Flexible Plan · 30% off every delivery
Zero sugar · 390mg sodium
From £24.95
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4,000 mg L-Taurine
4,000mg L-taurine, eight days before a hot race or through a hot block
From £28.95
Low Salt for normal sweat. Salt marks on your clothes or extreme heat? Replace Low Salt with High Salt. Mix the two to set your hour. 2 gels an hour = 80g carbs. Need more? 2 Low + 1 High = 120g.
In their words
Not sickly. Not artificial. Just easy to take.
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“Great taste! Really easy to digest. No stomach issues after”
Energy Gels · review via Judge.me
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“Easy to digest at race pace, very easy to open”
Energy Gels · review via Judge.me
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“Easy on the stomach and great fueling for long rides.”
Energy Gels · review via Judge.me
★ 4.8 from 326 athletes · Informed Sport tested batch by batch · Field-tested with professional triathletes and cyclists
Questions
Questions before your first box.
Which gel do I use?
Low Salt for normal sweat. Salt marks on your clothes or extreme heat? Replace Low Salt with High Salt. Mix the two to set your hour.
Will it be too sweet?
Reviewers call it mild and “not too sweet”. There’s no added flavour to fight at hour four.
Do I still need electrolytes?
The gels carry salt already. Heavy or salty sweaters add one Electrolytes sachet per bottle.
What does it cost per long run?
Two gels: £5.99 one-time, £4.19 on the Flexible Plan.
How fast is delivery?
Delivery to the UK: 1 to 3 working days, free over £40, otherwise the fee shows at checkout.
03 / From the field
“Easy on the stomach.”
The sentence our customers write most.
4.8
“These gels have been a game changer for me. I’ve never been able to stomach gels …”
Reviews via Judge.me, in the reviewers’ own words. … marks a cut.
Find your gelAs seen in / Partnered with
04 / Bundles
Save 15%
The Race Ready System
Gels and Electrolytes for the block. CoreCtrl for the eight days before a hot race.
One box, one timeline, nothing left to work out the night before.
40 × Energy Gels40 × Electrolytes8 × CoreCtrl1 × Bottle
£169.95£199.80 bought separately
60 days to decide, full refund if it isn’t right.
05 / Athletes
Trusted from the podium to the parkrun.
Raced by Olympians and pros. Reviewed by 326 athletes like you.
Tap a face to read their story.
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Alistair Brownlee
“By race day, your legs should be doing the work, not your brain.”
Alistair Brownlee · Co-founder
Triathlon / Co-founder
Two-time Olympic triathlon champion and co-founder of truefuels®.
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Ben Millar
“For me, it’s pretty simple: the gels taste great, they’re easy to consume, and I’ve had zero stomach issues with them. 40g of carbs never felt so easy.”
Ben Millar · Reflex-Nopinz
Reflex-Nopinz
One of the UK's leading hill climbers, with 34 hill climb wins and a national-level road race and stage win.
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Malachi Cashmore
“A gel I can actually get down means I’m still fuelling when it matters most.”
Malachi Cashmore · Professional triathlete
Triathlon / Professional
British professional triathlete racing middle distance, seventh at Ironman Pro Series Swansea this year.
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Joanna Tallmann
“What I like about truefuels is the understated flavour. It’s not a taste you get tired of quickly.”
Joanna Tallmann · Ultrarunner
Ultrarunning / Zugspitz Ultratrail winner
Zugspitz Ultratrail winner in 2025 and 2026, and first woman at Kaçkar by UTMB in September.
06 / Our process
Nothing reaches the shelf without clearing three stages.
Lab, elite athletes, then real races. Every truefuels® formula earns its place before it earns your money.
How We Test
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01
Lab testing
Developed by Alistair, who has taken 10,000 gels.
Built in the lab with Alistair and a team of sports scientists, around one question: what still works when you’re exhausted?
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02
Athlete testing
Tested by 50+ elite athletes in real conditions.
Real training volume, real heat, real race days.
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03
Race trial
Then raced where it counts.
Official nutrition partner of the Castle Race Series, and used by 20+ Brownlee Fitness coaches.
Stages 01 to 03 are the gate. Nothing ships until all three are cleared.
How We Test
07 / Heat preparation
NewHeat is a condition you train and race in, not a limit you hit.
Eight days before a hot race, or every day through a hot block. Racing somewhere warm this winter? Start seven days before you fly.
- 8Days
- Before heat exposure
- 4,000mg
- L-Taurine per sachet
- 4
- Electrolytes
“Racing Ironman Da Nang in 35-degree heat with a Kona slot on the line, nutrition couldn’t be an afterthought. …”
Trialled through the Australian Open Startups partnership
08 / Shared by you
Shared by you.
Tag @truefuels on your long run and it could be here next.
09 / The Fourth Discipline
Swim.Bike.Run.Fuel.
Whether you swim, ride or run, there’s one discipline nobody sees on the start list, and it decides the finish. Train it like the others.
Enter the Fourth Discipline“Fuelled my way to Kona”Alan C., Ironman Da Nang, 35°C · review via Judge.me
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Science / 8 min
Before the Start LineRace day is the part of triathlon we see. The swim. The bike. The run. The finish line. But what we don't see is everything that happens before the starting gun. The...Read article
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Race report / 3 min
From London Cool to Athens Heat: My Poseidon Half Marathon ExperienceMy first half marathon in the heat didn’t go exactly to plan, but it worked. I finished the Poseidon Half Marathon in Athens in 1:57.Read article
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Alistair Brownlee / 7 min
Alistair Brownlee on Heat Acclimation: From Beijing Lessons to Your Body's Heat ArmourMy heat prep has evolved over my career: from minimal sessions as "insurance" for London 2012, to saunas/heated bathrooms for Rio 2016, plus overdressing, hot baths, sealed tents, and painting suits. All...Read article
“Race day should just be an extension of the habits you built in training.”
Alistair Brownlee, two-time Olympic triathlon champion
Train with it before you race with it.
Start with a box of gels