SiS Beta Fuel for Running: Revolutionising Endurance Nutrition

26th Nov 2025

SiS Beta Fuel allows runners to absorb 80–120g of carbohydrates per hour using a unique 1:0.8 maltodextrin to fructose ratio. It improves power output, reduces GI distress, and supports mental clarity with innovative formats like gels, chews, and nootropic-infused fuel. This guide shows you how to build a race-day strategy with Beta Fuel to go longer, stronger, and smarter.

Why Nutrition Is the Missing Link in Your Running Performance

Most runners know the wall is that brutal moment when the legs give out and focus crumbles. Often, it’s not lack of training but under-fuelling and dehydration. uring endurance runs (2.5+ hours), optimal fuelling means consuming 80–120g of carbs per hour, a level rarely hit by casual fuelling plans.

What makes Beta Fuel different? It’s science-backed. Using a novel 1:0.8 maltodextrin to fructose ratio, it enhances carb absorption and reduces stomach upset compared to traditional 2:1 formulas.

What Makes SiS Beta Fuel Unique

The Science Behind the Formula

1:0.8 ratio of maltodextrin to fructose
Proven to increase carb oxidation by 17%
Reduces nausea and stomach fullness
Allows athletes to oxidise 1.5g carbs/min highest rates ever recorded

Why It Matters for Runners

Delays fatigue and preserves muscle glycogen
Maintains blood glucose levels
Reduces gastrointestinal distress even after 3+ hours of effort

Real-World Benefits Backed by Research

In a ground-breaking study:

Runners maintained high intensity with lower perceived effort
50% of energy used after 3 hours came from Beta Fuel not muscle stores
Performance increased in sprint efforts by 3%

This isn’t just theory, it's a paradigm shift in sports fuelling.

Formats to Match Every Runner

Powder (Drink Mix)

Best for hydration vests
Flavours: Red Berry, Strawberry & Lime, Orange
Includes sodium to maintain hydration

Gels & Gels with Nootropics

40g carbs per gel
Nootropic variant includes L-taurine, Cognizin®, caffeine, L-theanine
Helps with mental focus and avoiding caffeine jitters

Chews

Great for runners preferring solid textures
Easy to consume mid-run

Building Your Beta Fuel Strategy

Start training your gut gradually:

Begin at 60g carbs/hour and work up to 120g
Mix and match drinks, gels, and chews
Test during long training runs

Tip: Hydration and fuelling go hand-in-hand. Dehydrated runners report 37.5% more GI issues.

Your Competitive Edge Starts Here

Fuelling smarter doesn’t just prevent crashes it unlocks new performance potential. SiS Beta Fuel offers a flexible, scientifically proven way to sustain effort, improve focus, and eliminate the guesswork from endurance nutrition.

Try SiS Beta Fuel for Your Next Marathon or Long Run

Visit Science in Sport to explore the full Beta Fuel range. Experiment now, your future self will thank you at the finish line.

Frequently Asked Questions:

1. How many carbs per hour should I take with SiS Beta Fuel?

Start with 80–90g/hour. You can train your gut to tolerate up to 120g/hour.

2. Is the 1:0.8 ratio better than 2:1?

Yes. It improves absorption and reduces GI distress.

3. Can I use SiS Beta Fuel for races shorter than 2 hours?

It’s designed for 2.5+ hour efforts, but some use smaller doses for shorter events.

4. What are the benefits of the nootropic gel?

Boosts focus, reduces mental fatigue, and avoids caffeine crash.

5. Can I mix drink powder with chews or gels?

Absolutely. The range is designed to work in combination.

6. How do I avoid stomach issues while running?

Hydrate well, use the 1:0.8 ratio, and train your gut during long runs.

7. Which Beta Fuel format is best for me?

Try all three drinks, gel, and chew and see what works for your body and race goals.

Key Takeaways

Beta Fuel delivers 80–120g carbs/hour with less stomach upset
1:0.8 ratio boosts absorption by 17% vs older formulas
Enhances power and mental focus no more hitting the wall
Powder, gel, and chew formats to suit all runners
Scientifically proven to raise endurance and reduce fatigue