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FLYCARB

Lactate Shuttle

Lactate Shuttle

£21.99 GBP
£21.99 GBP
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Taxes included. Shipping calculated at checkout.

A high-carbohydrate drink containing calcium lactate. Lactate Shuttle delivers exogenous lactate as an additional, readily available fuel source, helping working muscles produce energy and sustain performance during high-intensity exercise.
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Lactate Shuttle

Lactate Shuttle

£21.99

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  • 600g Pouch | 25g Scoop (21g Carbs + 3g Calcium Lactate)
  • Optimal 1:0.8 Dual-Source Carbohydrate Ratio
  • Bodyweight Dosing: 2 to 4 Scoops Per Serving
  • Ideal Fuel Source for 2hr+ Events at Max Carb Ceiling
  • Research indicates Reduced Perceived Effort (RPE, p = 0.012)

New Boundaries

Fuel Beyond Carbohydrate

During longer events, endurance athletes frequently hit the gut's physiological ceiling for carbohydrate absorption, yet still require additional energy to sustain intensity.

It has been shown that lactate can be used as a fuel source, and research suggests it can be absorbed by parallel pathways alongside carbohydrates.

FLYCARB's Lactate Shuttle is designed as a convenient format fuel source for when you are already operating at your absolute limit of carbohydrate intake.

Formulated in a 600g pouch with a 25g measuring scoop (21g carbs in an optimal 1:0.8 ratio + 3g calcium lactate), Lactate Shuttle helps you maintain high-intensity power outputs late into long races.

Read The Black Paper

How it works

Serving Guide & Early Research

Bodyweight-Based Serving Recommendation

Select your serving based on your body weight. Each 600g pouch includes a 25g measuring scoop containing 21g of carbs in an optimal 1:0.8 Glucose to Fructose ratio and 3g of calcium lactate:

Body WeightRecommended ServingCarbohydratesCalcium Lactate
< 60 kg2 Scoops (50g powder)42g (1:0.8 ratio)6g
60 kg – 80 kg3 Scoops (75g powder)63g (1:0.8 ratio)9g
80+ kg4 Scoops (100g powder)84g (1:0.8 ratio)12g

Clinical Evidence: Reduced Rating of Perceived Exertion (RPE)

Peer-reviewed research in trained endurance cyclists evaluated oral calcium lactate supplementation during simulated road race cycling. The study demonstrated a statistically significant reduction in Rating of Perceived Exertion (RPE, p = 0.012).

Next Generation Fueling

Why Choose FLYCARB Lactate Shuttle?

Lactate Shuttle combines high-density carbohydrates with exogenous calcium lactate to unlock energy pathways that standard sports drinks can't reach.

Our pick FLYCARB Lactate Shuttle Lactate Carb Gels
Powdered formulationEnables easy fueling via bottle
Decoupled sodium intakeUsing calcium lactate means you have freedom to design your sodium intake separately
Bodyweight dosingPersonalised serving per kg of body weight aligned with the research

Everything you need to know

Frequently Asked Questions

What is FLYCARB Lactate Shuttle?

A high-carbohydrate drink mix containing calcium lactate, packaged in a 600g pouch. FLYCARB Lactate Shuttle delivers exogenous lactate as an additional fuel source, helping working muscles produce energy and sustain performance during high-intensity exercise.

Doesn't lactate cause muscle burning and fatigue?

No! Modern exercise science (the Lactate Shuttle theory) refutes the outdated myth that lactate causes fatigue or muscle burn. Muscle acidosis is caused by hydrogen ion accumulation. Lactate is actually a highly efficient energy carrier actively imported into mitochondria to generate ATP during hard exertion.

How much Lactate Shuttle should I consume based on my body weight?

Mix your bodyweight-specific serving in ~500ml of water:
- Under 60kg: 2 scoops (50g powder → 42g carbs, 6g calcium lactate)
- 60kg – 80kg: 3 scoops (75g powder → 63g carbs, 9g calcium lactate)
- Over 80kg: 4 scoops (100g powder → 84g carbs, 12g calcium lactate)

Each 600g pouch includes a 25g measuring scoop delivering 21g of carbs in an optimal 1:0.8 ratio plus 3g of calcium lactate.

Why is Lactate Shuttle ideal for 2hr+ races and long events?

During events lasting 2 hours or more, endurance athletes can hit the gut's physiological ceiling for carbohydrate absorption. Lactate Shuttle provides an additional, parallel fuel source via monocarboxylate transporters (MCTs) rather than intestinal sugar channels, allowing you to increase oxidative energy delivery when you are already operating at your carbohydrate intake limit.

What does clinical research show about perceived effort (RPE)?

Peer-reviewed clinical research in trained cyclists demonstrated that oral calcium lactate supplementation produces a statistically significant reduction in Rating of Perceived Exertion (RPE, p = 0.012).

Is Lactate Shuttle WADA compliant and safe?

FLYCARB's Lactate Shuttle does not contain any banned ingredients.

It is not currently Informed Sport Certified, but this is something we will review.

Shipping & Returns

UK Shipping

  • Royal Mail 48: 2–3 working days
  • Royal Mail 24: Next working day
  • Fully tracked delivery

Returns

Full refund within 14 days if unopened and in original packaging.

Nutritional Information (Typical Values)

Nutrition Facts - Per 100g

Energy 370kcal
Energy kj 1547.9kJ
Fat 0.0g
Of which saturates 0g
Carbohydrates 92.0g
Of which sugars 42.3g
Fibre 1.8g
Protein 0.1g
Salt 0.1g
Sodium 0.02g
Ingredients

Maltodextrin , Fructose , Xanthan Gum , Lemon Flavouring , Calcium Lactate