Geles energéticos
40g carbs and 98mg or 386mg sodium in one gel.
Informed Sport certified · Developed with Alistair Brownlee
Tested with 50+ elite athletes, then raced at the Castle Race Series.
60-day guarantee, opened or not. See Delivery and returns
Made in the UK
Informed Sport certified
40g carbs · 1:1 glucose:fructose · Unflavoured
“Great taste! Really easy to digest. No stomach issues after… easy to digest. No stomach issues …”
“… easy to digest and stop me from needing to carry salt tabs as well… stop me from needing to carry salt tabs …”
“hands down the best gels I’ve used”
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
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.
Gels per hour, from the box: 1 at low intensity, 1 to 2 at medium, 2 to 3 at high. On high sweat, 1 Low + 1 High at medium and 1 Low + 2 High at high.
| Before | One gel 15 minutes before the start. |
|---|---|
| During | Gels by the table on the box, with water. |
| 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, free over £40, otherwise the fee shows at checkout.
The 60-day guarantee covers opened products. If it isn’t right, email support@truefuels.com within 60 days of purchase for a full refund.
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.
Geles energéticos · from £29.95
01 / The problem
Energy Gel · 40g carbohydrate
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Gels 1 and 2
Other gels:
Most gels are built for the first hour.truefuels: 40g of carbs and the salt you need, in one gel. -
Gels 3 and 4
Other gels:
Too sweet, too thick.truefuels: Thinner than most gels.By the third, the sweetness and the thickness are what you remember, not the carbs.
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Gels 5 and 6
Other gels:
A stomach that votes against the plan.truefuels: Gel six tastes like gel one.Mild, with a hint of salt.
“Most gels I just can’t stomach, 2 is my limit, but these are no problem at all.”
02 / Why it works
Fuel that keeps pace with the effort.
40g carbohydrate
Enough to matter on long days, in one sachet. Two gels an hour gives you 80g.
Two salt levels
Low for normal sweat. High when you see salt marks on your clothes or race in extreme heat.
“Easy on the stomach.”
“… managed 8 gels in 4 hours with no stomach issues. …”
JF, marathon · review via Judge.me
Race tested
Tested with 50+ elite athletes before launch, then raced at the Castle Race Series.
03 / The dial
Two salt settings, one rule.
Mix the two to set your hour.
Low Salt for normal sweat.
Salt marks on your clothes or extreme heat? Replace Low Salt with High Salt.
| Gels per hour | Normal sweat | Salt marks or extreme heat |
|---|---|---|
| Low intensity | 1 Low · 40g · 98mg | 1 High · 40g · 386mg |
| Medium intensity | 1 to 2 Low · 40 to 80g · 98 to 196mg | 1 Low + 1 High · 80g · 484mg |
| High intensity | 2 to 3 Low · 80 to 120g · 196 to 294mg | 1 Low + 2 High · 120g · 870mg |
The salt is already in the gel, so you’re not carrying tabs.
04 / Proof
“Easy on the stomach.”
4.8
329 reviews
- 96%
- rated the gels 4 or 5 stars
★ 4.8 from 238 reviews · 228 of 238 rated 4 or 5 stars · Developed with Alistair Brownlee, two-time Olympic triathlon champion
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“Love them, the taste is great and are very easy on my stomach. Highly recommend”
Bryan D. · review via Judge.me -
“… I have been able to build up use to 120g+/hr whereas with other brands I was struggling with such high carb loading.”
mark m. · review via Judge.me -
“Easy on the stomach and great fueling for long rides.”
Jez T. · review via Judge.me -
“A great product and very easy on the tummy.”
Mark W. · review via Judge.me -
“… I find it easy to digest with no stomach pain or cramping. … I’m training for my first Ironman and find these help on the long training efforts.”
Damen F. · review via Judge.me -
“… It helped me achieve a 21-minute PB in a Half-Ironman race this summer.”
Tom C. · heavy sweater · review via Judge.me
Alistair’s perspective
“You simply decide whether today’s session requires one, two or three gels.”
One- Two
- Three
Alistair Brownlee · Two-time Olympic triathlon champion · Co-founder
05 / The system
Works best as a system.
-
Electrolitos
1g Salt per stick · 390mg sodium
From £24.95
-
CoreCtrl
4,000mg L-Taurine
From £28.95
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Flexible Plan
Never run out mid-block. 50% off your first month.
- Every delivery50% off your first month, then 30% off every delivery
- Every monthDelivered every month
- Month 3Free bottle after your third month
- Month 6Free Pro membership in month six: free shipping, early access to new drops and merch
- AnytimeSkip, reschedule or cancel anytime
The Fourth Discipline™
The system is ours. The destination is yours.
06 / 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 processGlucose and fructose, 1:1. The fuel for long efforts
or 98mg From Himalayan salt: 1g salt in High Salt, 0.25g in Low Salt.
From coconut. 14% of your daily reference intake, in every gel.
8% of your daily reference intake, in every gel.
Mix the two to set sodium independently of carbs. 1 Low + 1 High = 80g carbs and 484mg 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.
07 / How to use
Simple enough to do at race pace.
One gel 15 minutes before the start. Then by the table on the box, for your race:
Your kit
CoreCtrl- Energy Gels
Electrolytes
Your kit
- CoreCtrl
- Energy Gels
- Electrolytes
Your kit
- CoreCtrl
- Energy Gels
- Electrolytes
Your kit
- CoreCtrl
- Energy Gels
- Electrolytes
Race protocol · Marathon
- Hot race
- 1 CoreCtrl sachet a day from 7 days before, the eighth on race morning
- 30 min before
- 1 Electrolytes in 500ml water
- Pre-start
- 1 Energy Gel
- Energy Gels
- 2 an hour = 80g carbs. Low Salt for normal sweat; salt marks or extreme heat: High Salt
- Hydration
- 150 to 250ml per gel. Heat or heavy sweat: 1 Electrolytes
- Straight after
- 1 Electrolytes in 500ml water
Race protocol · Half Ironman
- Hot race
- 1 CoreCtrl sachet a day from 7 days before, the eighth on race morning
- 30 min before
- 1 Electrolytes in 500ml water
- Pre-start
- 1 Energy Gel
- Energy Gels
- bike 2 to 3 an hour = 80 to 120g carbs. Run 2 an hour = 80g carbs. Low Salt for normal sweat; salt marks or extreme heat: High Salt
- Hydration
- 400 to 800ml an hour. Heat or heavy sweat: 1 Electrolytes
- Straight after
- 1 Electrolytes in 500ml water
Race protocol · Ironman
- Hot race
- 1 CoreCtrl sachet a day from 7 days before, the eighth on race morning
- 30 min before
- 1 Electrolytes in 500ml water
- Pre-start
- 1 Energy Gel
- Energy Gels
- bike 2 to 3 an hour = 80 to 120g carbs. Run 2 an hour = 80g carbs. Low Salt for normal sweat; salt marks or extreme heat: High Salt. Add on-course nutrition as needed
- Hydration
- 500 to 900ml an hour. Heavy sweaters: Electrolytes
- Straight after
- replace 100 to 150% of the fluid lost, 1 Electrolytes in 500ml water
Race protocol · HYROX
- Hot race
- 1 CoreCtrl sachet a day from 7 days before, the eighth on race morning
- 30 min before
- 1 Electrolytes in 500ml water
- Pre-start
- 1 Energy Gel
- Energy Gels
- mid-race (about 40 min), 1 gel, optional. Low Salt for normal sweat; salt marks or extreme heat: High Salt
- Hydration
- sip at each station
- Straight after
- 1 Electrolytes in 500ml water
08 / 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.
09 / Athletes
Trusted from the podium to the parkrun.
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
10 / Questions
Questions? Answered.
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.
Is it sweet?
Mild. Reviewers most often say “not too sweet” and “easy to get down”.
I’m switching from Maurten, SiS or Precision. How do I start?
Swap like for like on 40g, then use your long sessions to test before race day.
What does it cost per 10g of carbs?
£0.75 one-time for a box of 10, from £0.34 on the Flexible Plan.
Do I still need electrolytes?
Up to 870mg sodium an hour comes from the gels, at 1 Low + 2 High. Heavy or salty sweaters add Electrolytes in the bottle.
How do I open it on the bike?
Tear from the notch, one-handed.
Delivery?
Delivery to the UK: 1 to 3 working days, free over £40, otherwise the fee shows at checkout. The delivery date for your order is shown under Add to cart.
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.
truefuels® · The Fourth Discipline™
Train with it before you race with it.
Order a Mix Box, use it on your next three long sessions, and race with the setting that worked.
Order a Mix Box