Training Bundle
One Mix Box of 20 Energy Gels, Low Salt and High Salt. One box of 20 Electrolytes, Mint or Watermelon. For the work that builds the race.
Enough for about 10 long sessions: 2 gels in the pocket, electrolytes in the bottle.
Informed Sport certified
Selected for the Australian Open StartUps 2026 cohort
Benefits
- 20 Energy Gels in the Mix Box: Low Salt and High Salt
- 20 Electrolytes: pick Mint or Watermelon
- Built for a full training block, indoors or out
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. See Delivery and returns
Made in the UK
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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
Fuel the work that builds the race.
| Before | One electrolyte sachet in 500ml of cold water |
|---|---|
| During | A gel every 30 to 45 minutes on the long ones, with water. The salt is already in the gel. On hot or long days, add Electrolytes to the bottle. |
| After | Refuel, then log 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
20 Energy Gels in the Mix Box, Low Salt and High Salt: carbohydrate that keeps session quality up.
20 Electrolytes, Mint or Watermelon: sodium and minerals replaced as you sweat.
A full training block, in one order.
Delivery and returns
Delivery to the UK: 1 to 3 working days, with the shipping fee shown 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.
Training Bundle · from £79.95
02 / In the box
Fuel the work that builds the race.
20 Energy Gels, Mix Box
Low Salt and High Salt in one box, to try both on the long sessions.
20 Electrolytes
Mint or Watermelon. Sodium and minerals replaced as you sweat.
Indoor sessions
Heat and still air raise what you lose.
One box
A full training block, in one order.
03 / Reviews
4.8
238 reviews
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“Great to have fuel and hydration at the same time!”
Guillaume · Verified -
“Amazing taste, have been using for 8 months and have recommended to all I know !”
John S. · Verified -
“Great taste! Really easy to digest. No stomach issues after”
Oli L. · Verified · Energy Gels -
“Love them, the taste is great and are very easy on my stomach. Highly recommend”
Bryan D. · Verified · Energy Gels -
“The mint has a great flavour, nice and subtle. Easy to drink”
Luke T. · Verified · Electrolytes -
“Easy on the stomach and great fueling for long rides.”
Jez T. · Verified · Energy Gels
04 / Complete the system
Works best as a system.
-
CoreCtrl
4,000mg L-Taurine
From £28.95
-
Geles energéticos
40g Carbs per gel
From £29.95
-
The Fourth Discipline™
The system is ours. The destination is yours.
Alistair’s Perspective
“I often made the mistake of treating hydration as something that only mattered during the race. I realised it was something I had to manage every day. Race day should just be an extension of the habits you built in training.”
05 / Formula
What's inside. Nothing it doesn't need.
These products don’t stop evolving once they ship. We keep testing and refining them with sports scientists and our own athletes.
See our processPer gel, per sachet.
06 / Tested
Batch tested. Nothing to hide.
Every batch is screened for banned substances before it ships.
- Informed Sport
- Batch tested
- Vegan
- Gluten free
- No artificial colours
- Made in the UK
07 / How to use
Mix it. Fuel it. Repeat it.
One electrolyte sachet in 500ml of cold water.
A gel every 30 to 45 minutes on the long ones.
The salt is already in the gel. On hot or long days, add Electrolytes to the bottle.
Refuel, then log what worked for next time.
08 / Your plan
Get your personalised fuelling plan.
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 / In their words
What athletes told us.
- 82%
- noticed a positive difference in their fuelling
- 96%
- rated the gels 4 or 5 stars
Athlete debrief, n=28. Gel reviews: 228 of 238 rated 4 or 5 stars.
10 / Athletes
Trusted from the podium to the parkrun.
Tap a face to read their story.
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Alistair Brownlee
“The best strategy is usually the simplest one.”
Alistair Brownlee · Co-founder
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Ben Millar
“I’m also a massive fan of the watermelon electrolytes. They’re my daily go-to.”
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
11 / Questions
Questions? Answered.
What’s in the box?
20 Energy Gels in the Mix Box, Low Salt and High Salt, and 20 Electrolytes in Mint or Watermelon, your choice.
Can I take Electrolytes and gels together?
Yes. Every gel already carries salt: 98mg sodium in Low Salt, 386mg in High Salt. On long, hot or heavy-sweat days, a sachet of Electrolytes in your bottle adds 390mg more.
Which gel do I use when?
By how much salt you lose, not by the forecast. High Salt for heat, indoor sessions, long efforts and salty sweat (salt on your skin or kit afterwards). Low Salt for cool sessions outdoors and light sweaters. Mix them to set your hour. Your plan on this page works it out from your sweat, the conditions and your race.
How do I mix Electrolytes?
One sachet in 500ml of cold water. The gels already carry salt, so add Electrolytes on hot or long days: 2 to 4 sachets an hour in hot conditions, the higher end if you sweat heavily.
Is it tested for banned substances?
Yes. Every batch is Informed Sport certified before it ships.
What if it isn’t right for me?
You have 60 days to decide. If it isn’t right, email support@truefuels.com for a full refund.
How fast is delivery?
Delivery to the UK: 1 to 3 working days, with the shipping fee shown at checkout.