40g
Carbohydrate per gelOne gel. Two settings.
Nothing else to carry.
40g of carbohydrate with the salt already inside. Low Salt (98mg sodium) for outdoor sessions, High Salt (386mg) for indoor sessions or when you sweat heavily. Start the Flexible Plan and your first box of 20 is half price.
4.8★ from 300+ reviews · Informed Sport certified · 60 days to decide
Fig. 01 The long way upScroll ↓
98 / 386mg
Sodium, two settings4.8★
From 300+ reviewsInformed Sport
Certified01 / Why one gel, two settings
Carbs and salt. One thing to remember.
Same mild taste, same texture in both settings. You only change the salt.
Most fuelling plans split the job in two: carbs from a gel, salt from a tab or a second bottle. In training, you manage. Late in a hot race, the tab stays in your pocket and the bottle gets missed at the aid station. truefuels puts the salt inside the gel you were already going to take.
“As a heavy sweater who needs approx 1500mg sodium per hour I have previously had to carry multiple products to meet my nutrition needs, not anymore.”Verified customer, Scotland
Outdoor sessions, Low Salt. Indoor sessions, or if you sweat heavily, High Salt. Combine them to set your hour.
| Per hour | Carbs | Sodium |
|---|---|---|
| 2 × Low | 80g | ≈ 200mg |
| 1 × Low + 1 × High | 80g | ≈ 480mg |
| 2 × High | 80g | ≈ 770mg |
| 2 × Low + 1 × High | 120g | ≈ 580mg |
| 3 × High | 120g | ≈ 1,160mg |
02 / Build your first box
Pick your setting. We'll keep you stocked.
Not sure which? Start with the Mix Box: 10 Low and 10 High to find your setting across your next long sessions.
First box half priceFig. 02 Energy Gels, box of 20Women’s Running Awards 2025 winner
Energy Gels
40g carbohydrate with the salt already inside. Mild on purpose: gel six should taste like gel one.
Salt setting10 of each · find your setting
Start my plan · Mix Box£35.68Train with it before you race with it. 60 days to decide, full refund if it isn’t right.
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First-box price for new Flexible Plan subscribers. One per customer.
03 / What customers notice
In their words, not ours.
From verified reviews of the Energy Gels.
“I used both the 0.25 and 1.0 gels for a recent marathon and managed 8 gels in 4 hours with no stomach issues.”
“Most gels I just can’t stomach, 2 is my limit, but these are no problem at all.”
“Subtle, sensible flavours prevent sweetness fatigue.”
4.8
★★★★★
From 300+ reviews“Easy on the stomach” is the sentence our customers write most.
Mild, with a hint of salt. Thinner than most: take it straight, or empty it into a bottle on the bike.
04 / The ingredient panel
Six ingredients. Each one has a job.
No proprietary blends. Nothing added for colour or flavour drama.
MALTODEXTRIN + FRUCTOSECarbohydrate, 1:1 glucose to fructose
COCONUT WATER POWDERPotassium
HIMALAYAN SALTSodium
TRI-MAGNESIUM CITRATEMagnesium
POTASSIUM SORBATEKeeps it stable
WATER
PER GEL40G CARBOHYDRATE · 98MG OR 386MG SODIUM
Not because we claim it. Because the ingredient panel proves it.
05 / How the plan works
A plan that fits your training.
Delivered monthly and moved around your training block. Skip, pause or cancel from your account before your next order.
Delivery 01
Half price
£35.68 · 20 gels
Enough to try both settings across your next long sessions.
Delivery 02
30% off, every box
£41.97 · 20 gels
Your Flexible Plan price from here on. Change your salt setting before any delivery.
Delivery 03
Bottle included
Included
A truefuels bottle arrives with your third delivery.
06 / The numbers
Per 10g, not per sachet.
40g per sachet means fewer sachets per hour. Six months of fuelling at 20 gels a month.
| One-time | Flexible Plan | |
|---|---|---|
| First box of 20 | £59.95 | £35.68 |
| Per 10g carbohydrate, first box | £0.75 | £0.45 |
| Each box after | £59.95 | £41.97 |
| Per 10g carbohydrate, after | £0.75 | £0.52 |
| Six months, 120 gels | £359.70 | £245.53 |
| Extras | None | truefuels bottle |
| Commitment | None | None. Skip, pause or cancel any time |
07 / Built from the field
Tested where it counts.
Tested with around 50 elite triathletes before it went on sale. Co-designed by two-time Olympic triathlon champion Alistair Brownlee.
~50
Elite triathletes
Tested in real training volume, real heat and real race days before sale.
Informed Sport
Certified
Every product certified under the Informed Sport programme.
Castle Race Series
Official Nutrition Partner
Raced from the podium to the parkrun.
“Mix of salt concentrations is useful. I’m switching over to these from SIS betafuel for my next IM.”Verified customer, Bristol
08 / Questions
Before you start.
Anything else, our team is a message away.
Which gel do I use when?
Low Salt for outdoor sessions. High Salt for indoor sessions, or when you sweat heavily. Combine them to set your hour, using the table above.
Is it sweet?
Mild, with a little salt. Most reviews call it subtle; a few find it sweet. Try the Mix Box on long sessions first.
Can I switch mid-season?
Yes, in training. Never on race day. Use it on your next three long sessions; you have 60 days to decide.
Do I still need electrolytes?
Up to about 1,160mg sodium an hour comes from the gels alone (3 × High Salt). Heavy sweaters on long, hot days often add electrolytes in the bottle.
How does the price compare?
£0.75 per 10g carbohydrate at the one-time price, £0.52 on the Flexible Plan, £0.45 for your first box. 40g per sachet means fewer sachets per hour, so compare per 10g, not per sachet.
Is it tested for banned substances?
Every product is Informed Sport certified, batch-tested under the programme.
What if it isn’t right for me?
Email us within 60 days for a full refund.
How often will my gels arrive?
Once a month. Move the date to fit your training block or race calendar.
Can I switch between Low Salt, High Salt and the Mix Box?
Yes. Change your setting before any delivery.
Who can get the half-price first box?
Customers starting their first Flexible Plan subscription, one per customer. It applies to your first box. Every box after that is 30% off the one-time price.
Can I cancel after my first box?
Yes. There’s no commitment. Skip, pause or cancel from your account before your next order is processed.
09 / The fourth discipline
Swim. Bike. Run. Fuel.
Don’t change your fuel on race day. Change it in training. Your first 20 gels are £35.68, then 30% off every box, with 60 days to decide.
Start with the Mix BoxFirst box £35.68Mix Box · then £41.97
Start my plan