For long-course athletes · 4-minute read · Updated November 2026
Why Alistair Brownlee Co-Designed A Gel With Up To 386mg Of Sodium In Every Sachet
The two-time Olympic champion helped build one 40g gel in two salt levels, so your carbs and your salt arrive in the same sachet.
By the truefuels team, Barcelona · Co-designed with Alistair Brownlee
Informed Sport certified
Tested with ~50 elite triathletes
4.8 from 300+ verified reviews
sodium
98mg or 386mg
sodium per hour
up to ~1,160mg
carbs per gel
40g
Train with it for 60 days. If it doesn't suit you, full refund.
Most long-course athletes fuel from two places. Gels for carbs. Tabs or a bottle for salt. Late in a hot race, that is two things to remember when you can barely remember one. Alistair Brownlee co-designed truefuels to put both in one sachet. Here is what that changes.
1
Your carbs and your salt come in the same sachet
Every gel carries its own sodium, so it arrives on the same clock as the carbs. No tab to forget at hour three.
Tom C., verified customer, UK
"As a heavy sweater who needs approx 1500mg sodium per hour I have previously had to carry multiple products… not anymore."
2
Two salt levels, one gel
Low Salt has 98mg sodium. High Salt has 386mg. Both are 40g carbs, two kinds of sugar, same taste and texture. For Outside training, take Low. Indoor training, or on the turbo, take High.
| 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 |
Heavy sweaters may still need electrolytes.
3
Built from the field, not the lab bench
Alistair co-designed the gel with the truefuels team. It was tested with around 50 elite triathletes before it went on sale.
4
Six ingredients, mild on purpose
Fructose
Coconut water powder
Himalayan salt
Tri-magnesium citrate
Potassium sorbate
Maltodextrin
No added flavourings, no artificial sweeteners. A little salt keeps it mild, so gel six goes down like gel one.
Verified customer
"This is the 1st gel I've had that is not so sickly sweet."
5
Easier on your stomach
Two kinds of sugar use two routes into the body, so less sits in your stomach. The gel is thinner, so you can take it straight or drop it in a bottle. Everyone is different, so test it in training.
JF, verified customer
"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."
6
Checked, raced and reviewed
4.8 from 300+ verified reviews
Co-designed with two-time Olympic champion Alistair Brownlee
Informed Sport certified, batch tested
7
Train with it before you race with it
Never change your fuel on race day. Use it on your long sessions for 60 days. If it doesn't suit you, we refund you in full.
Find your setting
Mix Box
5 Low Salt + 5 High Salt gels. Enough for your next five long sessions at two gels each.
£20.97 £29.95
Subscribe for 30% off and Pro status with free delivery. Skip, pause or cancel any time.
60-day guarantee. If it doesn't suit you, full refund.
Informed Sport certified · Ships from Spain and the UK
Questions
Can I switch mid-season?
Yes, in training. Never change fuel on race day. That is why the guarantee runs 60 days.
Customer quotes are from verified Judge.me reviews. Individual experiences, not promises.
Alistair Brownlee is a co-founder of truefuels.
© 2026 truefuels, Barcelona.
Sodium needs vary between athletes. This page describes product composition and customer experiences. It is not medical advice.
Mix Box · €34.95