Races aren't lost at the finish.
They're lost at mile 18.
The truefuels system is built for what happens after the easy miles run out.
Informed Sport certified · Built by Alistair Brownlee · 4.86★ (200+ reviews)
60–90% of endurance athletes underfuel.
The wall, cramp and overheating are fuelling failures — not fitness failures.
Hitting the Wall
Your glycogen stores last 90-120 minutes at race pace. After that, the brain goes first — fog, confusion, loss of pace judgement. This is the wall. A fuelling failure, not a fitness failure.
Energy Gels
40g of fast carbohydrates per gel — Start at 30-40g carbs/hr in training, build 10-15g per week, arrive at race day absorbing 80-90g/hr.
Shop NowCramps
Calf cramps at km 35 are a sodium deficit compounded over 3+ hours — not bad luck. Electrolytes aren't a race-day top-up. They're a daily training habit. Water alone doesn't replace what sweat takes.
Electrolytes
390mg of sodium per sachet — matched to what your body actually loses in sweat, not inflated. Your hydration stays on track, from the first mile to the finish.
Shop NowHeat
75-80% of exercise energy becomes heat. On a warm race day, the body's cooling system can't keep pace — performance drops 5-10% before you realise why.
CoreCtrl
4,000mg of L-Taurine per sachet — taken daily for 8 days before your event to help your body handle heat under load. Stay in control when the conditions turn against you.
Shop NowYour Race Fuelling Calculator
Enter your race details and get a personalised gel and electrolyte plan.
Products & Bundles
Start with a bundle or build your own stack. Bundles save you vs buying separately.
RACE READY SYSTEM
40× Energy Gels + 20× Electrolyte sachets + 8× CoreCtrl sachets + FREE truefuels bottle
TRAINING BUNDLE
20× Energy Gels (mixed low + high salt) + 20× Electrolyte sachets
Gel — Low Salt (0.25g)
40g carbs · 0.25g salt · cool conditions · training
Gel — High Salt (1g)
40g carbs · 1g salt · hot / long efforts · heavy sweaters
Electrolytes
400mg sodium · 150mg potassium · 25mg magnesium
CoreCtrl™
4,000mg taurine · cramping + heat management
Frequently Asked Questions
Start fuelling at 45–60 minutes regardless of how you feel. Take a gel every 30–45 minutes after that. Don't wait until you're tired — by then glycogen is already depleted. Build this habit in training first: start at one gel per hour and add gradually.
For most runners: 2–3 gels over a half marathon. Use the calculator with your target finish time and conditions for a precise number. In warm conditions add an extra electrolyte sachet per hour.
60-90g per hour for efforts over 90 minutes. Start at 30-40g/hr and build week by week — the gut needs training to absorb at the higher end. truefuels gels are 40g each.
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