Off-Season Fuel Bundle

truefuels

Off-Season Fuel Bundle

1 box of 20 Energy Gels (10 High Salt+10 Low Salt).

1 box of 20 Electrolytes.

This bundle supports reliability before, during, and after training. That’s why this bundle pairs carbohydrates + electrolytes, the two fundamentals your body still needs, even when you’re not racing.

Our gels deliver 40g of carbohydrates in a precise 1:1 glucose–fructose ratio, ensuring high absorption without flavour fatigue. Paired with our functional electrolyte mix, delivering 400mg sodium, 150mg potassium, and 25mg magnesium per serving.

Neutral flavoured, no artificial ingredients, and no unnecessary sugar.

Nutritional info

Select your Electrolytes Flavour:

250mg

1000mg

Mix

Mint Watermelon

Select quantity

Mint Watermelon

Save

One time purchase

£84.89

One time purchase

30%

£84.89

Add to cart

2 to 3 business days UK / 4 to 11 business days EU

Informed Sports Certified

Tested and approved by the Women’s Running expert team across real training and race conditions — from 5K runs to ultramarathons.

Money back guaranteed on the first 60 days

Energy Gels = sustained training quality

Even in the off-season, structured sessions rely on carbohydrate availability.

Our 1:1 glucose–fructose gels:

Deliver fast, efficient energy
Reduce gut strain during repeated indoor sessions
Support intensity, focus, and session completion

Whether it’s sweet-spot intervals, long treadmill runs, or strength circuits — fuel keeps training productive, not just survivable.

Electrolytes = control hydration & performance indoors

Indoor training changes everything.

With limited airflow and higher ambient heat:

Sweat rates increase
Sodium losses rise
Dehydration happens faster — often unnoticed

Replacing water alone isn’t enough.

Our electrolyte formula restores:

Sodium for fluid balance and nerve function
Potassium & magnesium for muscle contraction and control
A clean, no-nonsense hydration profile — no fillers, no artificial sweeteners

Less cramping. Less fatigue. More control.

Indoor sessions are shorter — but often hotter, saltier, and more concentrated.

Under-fuel or under-hydrate now, and you risk:

Poor session quality
Slower adaptation
Accumulated fatigue heading into race prep

This bundle keeps the fundamentals covered — so every session counts.

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.

This gel is designed for endurance athletes who need reliable energy at higher intake rates

.

Ideal for:

Runners, cyclists, and triathletes
Training sessions and races lasting
60 minutes or more
Athletes aiming for
60–120 g of carbohydrates per hour
Anyone looking to fuel
without flavour fatigue or GI distress

Whether you’re building base endurance or racing at the limit, this gel is built to support consistent energy delivery when it matters most.

Gels

Each ingredient is selected for function, absorption, and tolerance — nothing more, nothing less.

Maltodextrin & Fructose
to support dual-path carbohydrate absorption
Himalayan Salt
for a naturally balanced sodium source
Coconut Water Powder
for a natural electrolyte profile
Tri Magnesium Citrate
for bioavailable magnesium
Minimal preservation for product stability

Ingredients:

Water, Maltodextrin, Fructose, Coconut Water Powder, Himalayan Salt, Tri Magnesium Citrate, Preservative (Potassium Sorbate)

Electrolytes

Pink Himalayan Salt

for a naturally balanced sodium source

Potassium & Magnesium Citrates

for high bioavailability and gentle digestion

Coconut Water Powder

— chosen for its natural electrolyte profile and superior quality

Natural flavours, citric acid, and stevia for a clean, refreshing taste

No artificial colours. No unnecessary fillers.

Only ingredients selected for function, absorption, and tolerance.

Ingredients:

Pink Himalayan Salt (1 g), Potassium Citrate (391 mg), Magnesium Citrate (210 mg), Coconut Water Powder (1 g), Anti-caking Agent (Silicon Dioxide), Citric Acid, Natural Flavour (Mint or Watermelon), Sweetener (Steviol Glycosides from Stevia)

per 100g

per serving

Energy

974 kJ / 229 kcal

682 kJ / 160 kcal

Carbohydrates

- of which sugars

57.2 g

33.5 g

40 g

23.4 g

Salt

0.35 g

1.4 g

0.25 g

1 g

Potassium

411 mg (21%*)

288 mg (14%*)

Sodium

141 mg**

552 mg**

98 mg**

386 mg**

Magnesium

43 mg (12%*)

30 mg (8%*)

Contains negligible amounts of fat and protein

*Reference intake of an average adult 8400kJ / 2000 kcal

** No established reference intake

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.

Fuel needs change with intensity, duration, and conditions.

The truefuels system allows you to separate energy from hydration and adjust both precisely.

Follow the truefuels stackability guide by Alistair Brownlee

to personalise your fueling strategy — from training to race day.

Science Corner: Why Electrolytes Matter in Endurance Performance

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 your muscles firing...

truefuels Protocol - Learn how to fuel like Alistair Brownlee

Complete the 3 minutes survey with all your training data and you will get a better understanding of how to fuel yourself with our personalised guide created by truefuels and fueled by Alistair Brownlee.

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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

Why take both?

Energy Gels = sustained training quality

Even in the off-season, structured sessions rely on carbohydrate availability.

Our 1:1 glucose–fructose gels:

Deliver fast, efficient energy

Reduce gut strain during repeated indoor sessions

Support intensity, focus, and session completion

Whether it’s sweet-spot intervals, long treadmill runs, or strength circuits — fuel keeps training productive, not just survivable.

Electrolytes = control hydration & performance indoors

Indoor training changes everything.

With limited airflow and higher ambient heat:

Sweat rates increase

Sodium losses rise

Dehydration happens faster — often unnoticed

Replacing water alone isn’t enough.

Our electrolyte formula restores:

Sodium for fluid balance and nerve function

Potassium & magnesium for muscle contraction and control

A clean, no-nonsense hydration profile — no fillers, no artificial sweeteners

Less cramping. Less fatigue. More control.

Why this matters in the off-season

Indoor sessions are shorter — but often hotter, saltier, and more concentrated.

Under-fuel or under-hydrate now, and you risk:

Poor session quality

Slower adaptation

Accumulated fatigue heading into race prep

This bundle keeps the fundamentals covered — so every session counts.

About the Fueling System

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.

Who is this for?

This gel is designed for endurance athletes who need reliable energy at higher intake rates

.

Ideal for:

Runners, cyclists, and triathletes

Training sessions and races lasting

60 minutes or more

Athletes aiming for

60–120 g of carbohydrates per hour

Anyone looking to fuel

without flavour fatigue or GI distress

Whether you’re building base endurance or racing at the limit, this gel is built to support consistent energy delivery when it matters most.

Quality Ingredients

Gels

Each ingredient is selected for function, absorption, and tolerance — nothing more, nothing less.

Maltodextrin & Fructose

to support dual-path carbohydrate absorption

Himalayan Salt

for a naturally balanced sodium source

Coconut Water Powder

for a natural electrolyte profile

Tri Magnesium Citrate

for bioavailable magnesium

Minimal preservation for product stability

Ingredients:

Water, Maltodextrin, Fructose, Coconut Water Powder, Himalayan Salt, Tri Magnesium Citrate, Preservative (Potassium Sorbate)

Electrolytes

Pink Himalayan Salt

for a naturally balanced sodium source

Potassium & Magnesium Citrates

for high bioavailability and gentle digestion

Coconut Water Powder

— chosen for its natural electrolyte profile and superior quality

Natural flavours, citric acid, and stevia for a clean, refreshing taste

No artificial colours. No unnecessary fillers.

Only ingredients selected for function, absorption, and tolerance.

Ingredients:

Pink Himalayan Salt (1 g), Potassium Citrate (391 mg), Magnesium Citrate (210 mg), Coconut Water Powder (1 g), Anti-caking Agent (Silicon Dioxide), Citric Acid, Natural Flavour (Mint or Watermelon), Sweetener (Steviol Glycosides from Stevia)

Nutritional Infos

per 100g

per serving

Energy

974 kJ / 229 kcal

682 kJ / 160 kcal

Carbohydrates

- of which sugars

57.2 g

33.5 g

40 g