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Fuel. Hydrate. Regulate.
One system for performance.

Created by Alistair Brownlee

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CoreCtrl™ - truefuels
CoreCtrl™

An 8-day loading protocol that builds thermal resilience from the inside. Built around a high-dose taurine base and key electrolytes.

From £28.95
Electrolytes Mint - truefuels
Electrolytes (20 Pack)

High-sodium active hydration delivering 400mg sodium, 150mg potassium, and 25mg magnesium per sachet. Engineered to replace exactly what sweat takes.

From £24.95 £1,25 / item
Energy Gels - truefuels
Energy Gels

40g of carbohydrates per gel, formulated with a 1:1 Maltodextrin-to-Fructose ratio for maximum absorption. Enhanced with a full active hydration electrolyte profile.

From £17.95 £3,00 / item
Off - Season Fuel Bundle - truefuels
Training Bundle (2x 20 Pack)

20 gels and 20 electrolytes, built to cover your nutritional need during your daily training.

£79.95 £84.90 -5%
Race Ready System - truefuels
Race Ready System

40x gels & electrolytes, and 8 CoreCtrl sachets. Everything from your first training session through to the finish line, in one complete system.

£169.95 £208.95 -18%

Used in training. Trusted on race day. By athletes and champions around the world. 4.8/5 stars.

Jim M.5/5
28.04.2026|truefuels Energy Gels

These are excellent gels. Not too sweet and easy to take. I also find them gentle on my stomach, no issues, so I'm very happy.

P D5/5
28.04.2026|truefuels Energy Gels

Tastes good and hasn’t caused any GI issues. Mix of salt levels is a nice touch and whole product give confidence to performance!

Sarah L.5/5
28.04.2026|truefuels Electrolytes

Nice flavour and gave me the replenishments needed!

@UKTOKONA20265/5
28.04.2026|truefuels Energy Gels

During last weekends Bath Beat Cross Country marathon, I hit the wall around 18-19 miles in, I was ready to through the towel in, my legs had had it,(the temperature was 22 degrees) I was running this after running the Paris Marathon less than two weeks earlier, I drank some of the true fuels electrolytes followed by your energy gel with 1g, within 4-5 min I really started to feel better and went on to finish the marathon feeling good at the finish! I normally use SiS , but will be using Truefuel from now on!! And will be taking these to the Ironman world championships in Kona in October.

John C.5/5
27.04.2026|truefuels Electrolytes

Arrived promptly. Flavour tastes good and great to be able to replace my salts so easily through a drink. Really happy with the product.

Simon M.5/5
21.04.2026|truefuels Energy Gels

No stomach issues during long runs up to 22 miles with 5 or 6 gels. Only 4 stars as had several split whilst running.

Mark J.5/5
19.04.2026|truefuels Electrolytes

Great product definitely trying more no tummy issues easy to mix neutral flavour Great for long Training days

Hans Castorp5/5
19.04.2026|truefuels Energy Gels

Had some issues with this order, coming from UK to Spain was stopped at customs. Client Service went the extra mille yo make it possible so even it came very delayed, I'm grateful. Well done! Product excellent 👌

Vural3/5
17.04.2026|truefuels Electrolytes

Carb gel with sodium is great. Tearing off the package is not tricky. Its liquid form makes it easier to consume. It won't cause flavor fatigue. BUT taste is toooo sweet... this sweetness causes another type of taste fatigue.

ABOUT US

Created by Olympic champion Alistair Brownlee, every product is designed, tested, and refined to deliver what your body actually needs.

Built on truth.
Proven in performance.

We Didn't Guess. We Lived It.

Lab-Tested.
Alistair-Proven.
Designed for Everyone.

Science Corner

Select your race. Get your protocol.

Pre-Race Protocol

8 days before 1x CoreCtrl sachet Daily.
30 min before 1x Electrolyte + 500ml water.
Pre-Start 1x Energy Gel

Race Protocol

Energy Gels
Every 30 min 2/h = 80g carbs/h
<18°C: Low-Salt >18°C: High-Salt
Hydration
150–250ml per Gel >18°C: 1x Electrolytes
Always pair hydration with electrolytes

Post-Race Protocol

Immediately after 1x Electrolyte + 500ml water.

Pre-Race Protocol

8 days before 1x CoreCtrl sachet Daily.
30 min before 1x Electrolyte + 500ml water.
Pre-Start 1x Energy Gel

Race Protocol

Energy Gels
Bike: every 20–25 min 2–3/h = 80–120g carb
Run: every 30 min 2/h = 80g carb
Always High-Salt
Hydration
400–800ml / hour >18°C: 1x Electrolytes
Always pair hydration with electrolytes

Post-Race Protocol

Immediately after 1x Electrolyte + 500ml hydration.

Pre-Race Protocol

8 days before 1x CoreCtrl sachet Daily.
30 min before 1x Electrolyte + 500ml water.
Pre-Start 1x Energy Gel

Race Protocol

Energy Gels
Bike: every 20–25 min 2–3/h = 80–120g carb
Run: every 30 min 2/h = 80g carb
Always High-Salt Supplement with on-course nutrition as needed
Hydration
500–900ml / hour Heavy sweaters: Electrolytes
Always pair hydration with electrolytes

Post-Race Protocol

Immediately after Replace 100–150% fluid lost. 1x Electrolyte + 500ml water.

Pre-Race Protocol

8 days before 1x CoreCtrl sachet Daily.
30 min before 1x Electrolyte + 500ml water.
Pre-Start 1x High-Salt Gel

Race Protocol

Energy Gels
Mid-race (~40 min) 1 Gel optional
Always High-Salt · 40g carbs · 1.0g salt
Hydration Sip at each station

Post-Race Protocol

Immediately after 1x Electrolyte + 500ml water.

The fuelling protocols above are general guidelines for informational purposes only. Individual requirements for fluid intake, carbohydrate consumption, and sodium replacement vary depending on body mass, training status, sweat rate, temperature, exercise intensity, gastrointestinal tolerance, and medical history. These protocols do not constitute medical or nutritional advice and are not a substitute for personalised guidance from a qualified sports dietitian or medical practitioner. To the fullest extent permitted by applicable law, Truefuels Ltd accepts no liability for any adverse effects arising from reliance on this information. By following these guidelines you do so entirely at your own risk. If you have a pre-existing medical condition or are taking medication, consult a qualified healthcare professional before following any nutrition or supplementation protocol.

go true Stories

Show all articles
001
Alistair Brownlee

Two-time Olympic Triathlon Champion | Multiple World, Commonwealth, European Champion | Co-founder, Investor

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Alistair Brownlee - truefuels
002
Alex Castellano

AI-technologist and long-distance runner

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Alex Castellano - truefuels
003
Gregory Mac Donald

Triathlete, Runner, cyclist still in pursuit of human challenges and refusing to wind down

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Gregory Mac Donald - truefuels
004
Dan Furze

Entrepreneur, endurance athlete & Ironman Tri Nations finisher, chasing the Konadream

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Dan Furze - truefuels

Master your fueling

Glycogen Storage: Is it the Key to Athletic Success?

The speed read Glycogen is the stored form of glucose in our muscles and liver. It’s essential for endurance, high-intensity efforts, and recovery. When glycogen runs low, performance declines. Whe...

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Glycogen Storage: Is it the Key to Athletic Success? - truefuels

Why Electrolytes Matter in Endurance Performance

The Speed Read When we discuss electrolytes in endurance sports, we typically mean sodium, potassium, magnesium, and chloride. They are more than just “salts.” They’re essential minerals that keep ...

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Why Electrolytes Matter in Endurance Performance - truefuels

Nutritional Best Practices for Endurance Athletes

The Speed Read: Why Nutrition Matters Fuelling for endurance isn’t just about loading up on carbs the night before a race. To perform, recover, and stay healthy, you need a well-rounded nutritional...

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Nutritional Best Practices for Endurance Athletes - truefuels

Frequently Asked Questions