Energy Gels
The gel your stomach stops noticing. 40g of carbohydrate with the salt already inside, in two settings matched to how you sweat.
Developed with two-time Olympic champion Alistair Brownlee · Informed Sport certified · Winner, Women’s Running Awards 2025
Benefits
- 40g carbohydrate per gel, so fewer sachets per hour.
- Low Salt (98mg sodium) below 18°C, High Salt (386mg) above it or if you sweat heavily.
- Mild, with a hint of salt, so gel six goes down like gel one.
Developed with Olympians. Trusted daily by athletes worldwide.
Train with it before you race with it. 60 days to decide, full refund if it isn’t right. Made in the UK
Batch tested
Our philosophy
Own your physiology. We develop what it takes for you to do just that.
Same philosophy, every product: based on the latest science, test it in the real world, stripped of anything that isn’t needed to perform again tomorrow.
Used by elite athletes around the world.
How to use
Pick Low Salt (40/0.25) below 18°C or if you sweat lightly. Pick High Salt (40/1.0) above 18°C or if you finish sessions with salt on your skin.
| Before | One gel 15 minutes before the start. |
|---|---|
| During | One gel every 30 to 45 minutes, with water. Below 18°C, Low Salt. Above, High. |
| After | Refuel, then note what worked for next time. |
For a plan built on your race, your sweat and the weather, use Your plan on this page. For a personal recommendation, email support@truefuels.com.
What it does
Each gel carries 40g of carbohydrate in a 1:1 glucose to fructose ratio, with electrolytes built in.
Two salt levels, 0.25g or 1g, so you can match the gel to how much you sweat. Neutral flavour, no artificial colours.
- 40g carbohydrate
- Two salt levels
- Easy on the stomach
- Race tested
Delivery and returns
Delivery to the UK: 1 to 3 working days, with the shipping fee shown at checkout.
You can cancel an order within 14 days, then return unopened products in their original condition within a further 14 days. We refund in full within 14 days of receiving them. Return postage is yours unless the item is faulty.
Faulty or damaged? Email support@truefuels.com with your order number and a photo. Full details in our returns and refunds policy.
Energy Gels · from £59.95 · per 10g carbs
02 / Why it works
Fuel that keeps pace with the effort.
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40g carbohydrate
Enough to matter on long days, in one sachet. Two gels an hour gives you 80g.
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Two salt levels
Low below 18°C. High above it, or when you sweat heavily.
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Easy on the stomach
“8 gels in 4 hours with no stomach issues.”
JF, marathon · review via Judge.me, edited -
Race tested
Tested with 50+ elite athletes before launch, then raced at the Castle Race Series.
03 / The system
Works best as a system.
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Electrolytes
1g Salt per stick
From £24.95
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CoreCtrl
4,000mg L-Taurine
From £28.95
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The Fourth Discipline™
Fuel smarter. Not harder.
The system is ours. The destination is yours.
Alistair’s Perspective
“As an athlete, I learnt that simplicity wins under pressure. I didn’t want a fuelling strategy that worked on paper. I wanted one that still worked when I was exhausted. That’s why every truefuels gel contains 40 g of carbohydrate. You don’t need to calculate 73 g or 87 g per hour. You simply decide whether today’s session requires one, two or three gels.”
“It helped me achieve a 21-minute PB in a Half-Ironman.”
04 / Formula
What's inside. Nothing it doesn't need.
Six ingredients plus water. Every one has a job, and every job fits on one line.
This formula doesn’t stop evolving once it ships. We keep testing and refining it with sports scientists and our own athletes.
See our processMix the two to set sodium independently of carbs. 1 Low + 1 High = 80g carbs and about 480mg sodium an hour.
Per gel: 160 kcal · 40g carbohydrate · 23.4g sugars · 288mg potassium · 30mg magnesium. Where two values are given, the first is High salt.
05 / Tested
Batch tested. Nothing to hide.
Every batch is screened for banned substances under Informed Sport before it ships. So you can race on it without a second thought.
- Informed Sport
- Batch tested
- Vegan
- Gluten free
- No artificial colours
- Made in the UK
06 / How to use
Simple enough to do at race pace.
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One gel 15 minutes before the start.
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One gel every 30 to 45 minutes, with water. Below 18°C, Low Salt. Above, High.
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Refuel, then note what worked for next time.
07 / Your plan
Get your personalised fuelling plan.
Your weight, your sweat, your race. We’ll tell you how many gels, which salt level, and when. No maths at mile 18.
If you have tested your sweat rate or sodium concentration, entering these will sharpen the fluid and electrolyte recommendations. Leave blank to use the algorithm's estimates.
Algorithm informed by published research on exercise fluid replacement, sweat rate, sweat sodium concentration and carbohydrate use during endurance exercise, including Sawka et al. (2007), Jeukendrup (2011) and Baker (2017). Constants: 40 g carbohydrate per gel, 1 g salt per high-salt gel, 0.25 g salt per low-salt gel and 1 g salt per electrolyte serving. Scientific estimate only. Individual variation exists. Validate all recommendations in training before race day.
08 / In their words
What athletes told us.
- 82%
- noticed a positive difference in their fuelling
- 96%
- rated the gels 4 or 5 stars
- 75%
- would be disappointed to go back to their old fuel
Athlete debrief, n=28. Gel reviews: 225 of 235 rated 4 or 5 stars.
09 / Athletes
Used where the margins are smallest.
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
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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
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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
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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
Flexible Plan
Never run out mid-block. Save 30%.
- 30% off every delivery
- Delivered every month
- Free bottle after your third month
- Free Pro membership in month six: first access to new product drops, extra discounts and VIP access to athlete content
- Skip, reschedule or cancel anytime
11 / Questions
Questions? Answered.
Which gel do I use when?
Low Salt below 18°C. High Salt above it, or if you finish sessions with salt on your skin. Mix them to set your hour.
Is it sweet?
Mild, with a little salt. Most reviews call it subtle; a few find it sweet. The Mix Box lets you try both on long sessions.
I use Maurten / SiS / Precision Fuel. Why switch?
Same job, one less product. Their carbs and your salt usually come from two places; ours come from one sachet. Switch in training, never on race day. You have 60 days.
Isn’t £3.00 a gel expensive?
Compare per 10g of carbs: £0.52 on the Flexible Plan, £0.75 one-time. At 40g a sachet you take fewer per hour.
Do I still need electrolytes?
Gels alone give up to about 1,160mg sodium an hour (3 × High). Heavy sweaters in heat often add Electrolytes to the bottle.
Can I put it in a bottle?
Yes. It’s thinner than most gels, so many customers mix it into water on the bike.
Is it tested for banned substances?
Every batch is Informed Sport certified before it ships.
How fast is delivery?
Delivery to the UK: 1 to 3 working days, with the shipping fee shown at checkout. The delivery date for your order is shown under Add to cart.