CoreCtrl™ — Stay in Control When It’s Hot

truefuels

CoreCtrl™

TrueCtrl. CoreCtrl™ is the truefuels cooling system™, designed for use in hot conditions.

Built around a high-dose taurine base, piperine, and key electrolytes, CoreCtrl™ works alongside hydration as part of your preparation strategy for training and racing in the heat.

No artificial cooling. Just support for the system already built into your body.

How to use: The best way to use the product is to take 1 sachet (7.56g) daily for 8 days prior to a hot event. Mix into 500ml of water. For users of <60kg (132lbs) use 2 days on, 1 day off. Always pair with hydration and electrolytes.

CoreCtrl™ doesn’t replace fuelling or hydration, it upgrades your cooling system.

Nutritional info

Select Quantity:

250mg

1000mg

Mix

8 16 32

Select quantity

8 16 32

Save

Subscribe & Save

30%

One time purchase

£28.95

One-time purchase

30%

£28.95

PRE-ORDER

Ships end of February - 2 to 3 business days UK /

4 to 11 business days EU

Informed Sports Certified

Tested in the warmest conditions with elite players of the Australian Open Tennis competitions

Money back guaranteed on the first 60 days

CoreCtrl™ is designed for use in hot conditions where maintaining hydration and electrolyte balance becomes increasingly important.

Built around a high-dose taurine base and key electrolytes, CoreCtrl™ works alongside hydration as part of your preparation strategy for training and racing in the heat.

† Water contributes to the maintenance of normal regulation of body temperature.

During exercise, approximately 75–80% of energy is released as

heat.

When heat production exceeds the bodyʼs ability to

dissipate it, performance becomes constrained, not by fitness or

motivation, but by protective physiological limits.

Research shows that targeted support of thermoregulation can:

Increase sweat response
Improve evaporative heat loss
Reduce internal heat storage
Extend sustainable performance in hot conditions

The result isnʼt a spike. Itʼs control, consistency, and resilience

when heat would normally become the limiter.

truefuels Gel delivers 40 grams of carbohydrates paired with an innovative 0.25 or 1 g salt and electrolyte blend, developed to meet the real fuelling demands of endurance athletes.

The 1:1 glucose–fructose ratio enables efficient carbohydrate uptake through multiple transport pathways, supporting high intake rates without overwhelming the gut.

Neutral in taste, easy to tolerate, and designed for consistent energy delivery — from long training sessions to race day.

Sweat loss varies widely between athletes and conditions. Both the volume of sweat and the amount of electrolytes lost can differ significantly depending on body size, intensity, and environment.

Rather than forcing a one-size-fits-all solution, truefuels® uses a modular electrolyte approach.

CoreCtrl™ contains defined amounts of key electrolytes per serving:

- Sodium: 97 mg

- Potassium: 300 mg

- Magnesium: 60 mg

This approach allows athletes to adjust overall fluid and electrolyte intake to suit individual needs and conditions, using water alongside the wider truefuels® electrolyte system.

Magnesium contributes to electrolyte balance and to a reduction of tiredness and fatigue.

Potassium contributes to normal muscle function.

L-Taurine, Acid (Citric Acid), Potassium Citrate, Calcium Citrate, Flavourings, Himalayan Rock Salt, Magnesium Citrate, Anti-caking Agent (Silica, from Bamboo), Sweetener (Steviol Glycosides from Stevia), Black Pepper Extract (Piper nigrum).

No colours. No unnecessary fillers. No fibre.

Nutrients

Amount

% NRV

L-Taurine

4000 mg

-

Potassium

300 mg

15%

Calcium

120 mg

15%

Magnesium

60 mg

16%

Himalayan rock salt

- of which Salt

250 mg

97 mg

-

Black pepper extract

5 mg

-

* Nutrient Reference Value (NRV)

NRV not established where indicated.

Formulated to hydrate! With 0 kcal, virtually no carbohydrates or sugar, this electrolyte mix focuses purely on hydration, mineral balance, and performance consistency.

Per serving:

Energy 0 kcal · Carbohydrate ≤ 1 g · Protein 0 g · Fat 0 g · Fibre 0 g

Salt 1 g providing

400 mg sodium, 150 mg potassium, 25 mg magnesium

1. Neutral taste. No flavour fatigue

A lightly sweet, neutral profile designed for long sessions and repeated intake without sensory overload.

2. Built for gut comfort

Refined, minimal composition developed for high carbohydrate usage while remaining gentle on the digestive system.

3. Maximum carbohydrate absorption

The 1:1 glucose–fructose ratio supports efficient uptake and helps sustain higher carb intakes when intensity and duration increase.

4. Stackable fuelling concept

Designed to integrate seamlessly with electrolytes and other TrueFuels products — allowing you to tailor energy and hydration independently.

5. Steady energy delivery

Developed from real-world endurance experience and informed by leading sports science to support consistent energy availability over time.

Training and racing in the heat requires more than one intervention. It requires a structured approach to hydration, electrolytes and fuelling.

truefuels is built as a modular system, so you can adjust intake based on session length, intensity, and environmental conditions.

CoreCtrl™ — Preparation Phase

Use in the days leading into hot training blocks or events as part of your structured heat-preparation routine.

Take a minimum of 8 servings prior to exposure to hot conditions. This can be taken as: 8 consecutive days, or 2 days on, 1 day off until 8 total servings are completed.

Always combine with appropriate hydration and electrolyte intake.

truefuels Electrolytes — During Training & Racing

Replace fluids and electrolytes according to your sweat rate and conditions. Electrolytes help maintain electrolyte balance and normal muscle function.

truefuels Performance Gel (40 / 0.25 & 40 / 1.0)

Match carbohydrate intake to session demands while adjusting sodium levels depending on temperature and sweat loss.

Cooler conditions → lower salt combinations

Hot conditions → higher salt combinations

Recovery Strategy

Post-session, replace 100–150% of fluid losses and restore carbohydrate availability as part of a complete recovery approach.

CoreCtrl™ is designed to sit alongside hydration, electrolytes and fuelling, not replace them. The system works best when all components are aligned to the demands of the environment.

When Heat Takes Control: My Two Close Calls and the Science of Fatigue

Heat has delivered some of my toughest racing lessons: Beijing 2008's gradual fade while leading the Olympic triathlon (to finish 12th), and London 2010's sudden blackout from exertional heat stroke (>41 °C core) with 500 m left. These weren't failures in fitness or motivation....

truefuels Protocol - Learn how to fuel like Alistair Brownlee

Understand how to fuel yourself with our personalised guide created by truefuels and fueled by Alistair Brownlee.

Get your fuel Protocol

comparison

How we are different

Our Product

Others

Support

Sections

Responsive

Visual canvas

Smart switch

Fast updates

Get our product with 20% discount

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Frequently Asked Questions

Every purchase at truefuels comes with a 60-day satisfaction guarantee, allowing you to test the product with complete peace of mind. If the product does not meet expectations for any reason, customers can simply email support@truefuels.com within 60 days of purchase, and the truefuels team will process a full refund—no questions asked.

This guarantee is part of truefuels' commitment to supporting athletes, ensuring that everyone can discover what works best for their performance with total confidence.

Our energy gel is crafted with a precise blend of carbohydrates, electrolytes, and hydration agents that work in harmony to:

Fuel your muscles:
Quick-acting carbohydrates provide immediate energy when needed.
Enhance hydration:
Essential electrolytes maintain fluid balance.
Support recovery:
A balanced formulation helps replenish glycogen and aids in post-exercise recovery.
Steady release system:
Endorsed by leading sports scientists, our gel delivers a continuous release of energy for sustained performance.

Carbohydrates are the primary fuel source for your body, especially during high-intensity exercise.

Here’s why they are essential for peak performance:

Your immediate Energy Source is
blood glucose, which your muscles rapidly use to provide the energy needed.
Glycogen Storage:
Glucose is stored in your muscles and liver as glycogen. These glycogen stores act as a readily available reserve that your body taps into during prolonged or intense exercise, helping to delay fatigue.
Enhanced Endurance:
Maintaining adequate carbohydrate levels ensures your muscles have the sustained energy required to perform at high intensities for longer durations. This is critical for endurance events where constant energy delivery is key.
Optimal Brain Function:
Carbohydrates also fuel your brain, supporting cognitive functions such as focus, coordination, and decision-making, which are crucial during competitive performance.
Efficient Recovery:
Consuming carbohydrates before, during, and after exercise helps replenish glycogen stores, accelerating recovery and preparing for subsequent training sessions or competitions.

Water:
Filtered and purified for essential hydration.
Maltodextrin:
A long chain of glucose molecules rapidly broken down and absorbed (via SGLT1) for immediate energy.
Fructose:
A natural sugar from fruit, absorbed via GLUT5, which complements maltodextrin and supports liver glycogen restoration.
Coconut Water Powder:
Provides electrolytes and essential vitamins/minerals for hydration and overall health.
Himalayan Salt:
Supplies essential sodium to maintain fluid balance during exercise.
Tri Magnesium Citrate:
A highly bioavailable form of magnesium in a triple citrate formulation, offering enhanced solubility and absorption to help prevent cramps and support overall performance.
Potassium Sorbate:
An antimicrobial agent that extends shelf life by preventing mold, yeast, and bacteria.

The performance gel results from a unique collaboration between top athletes and experts. It was co-designed by Olympic champion Alistair Brownlee and Nigel Mitchell, alongside renowned academics and a network of dedicated co-creators. With decades of experience, the latest research, extensive lab work, and rigorous field testing, we’ve crafted the ultimate performance gel to fuel your endurance and elevate your game.

Sodium is essential for maintaining fluid balance, nerve function, and muscle contraction. It helps prevent cramps and fatigue, making it a key component in any performance nutrition plan.

As soon as you create an account, you will be a Base member - automatically and at no cost! After, our membership levels are based on the quantity of order per year to unlock certain benefits as indicated below:

Base Member

How to join: Create an account

Perfect for: New fans and everyday athletes

Benefits:

Exclusive newsletter with training tips, athlete stories & product insights
Early access to product pre-orders
Access to truefuels community events (city runs, training sessions)

Core Member

How to Qualify: 6 orders per year

Perfect for: Loyal customers fueling their journey year-round

All level 1 benefits, plus:

Annual truefuels merchandise Gift Card
Extra Discount on pre-order specials and seasonal sales specials
Preferred access to exclusive live events (Q&As, athlete meetups)
Occasional access to limited-run gear or collabs

Pro Member

How to qualify: 12+ orders per year - ordering by subscription autom. gives this member status

Perfect for: High-performance athletes and superfans

All level 2 benefits, plus:

Free delivery on all orders
First access to all new product drops
Maximum Discount on all products during pre-access windows —- 10% extra ( potentially stackable with other offers)
Special discount on all merchandise all year long
Signed merchandise guarantee (minimum 1/year from Truefuels athlete partners)
VIP access to behind-the-scenes athlete content and product R&D insightserks with every order. truefuels memberships are free and automatic - no attachments, just rewards.

We offer reliable and fast shipping on all truefuels products. For detailed information on shipping methods, transit times, and tracking, please refer to our Shipping Policy

We love feedback! Please submit all feedback and suggestions via our form on the Contact Page. Your input is invaluable in helping us improve our products and services.

Our philosophy is simple: athletes deserve nutrition that is as pure, focused, and determined as they are. We combine years of competitive experience with the latest scientific research to create products free from unnecessary additives, gentle on the digestive system, and tailored to the rigorous demands of human performance. Every product goes through a detailed forensic development process to ensure consistency and repeatability. When you choose truefuels, you join a community that values integrity, innovation, and the relentless pursuit of excellence.

See more

What is CoreCtrl™?