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    Rendezvu
    On a mission to get more people to enjoy the outdoors© 2026
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    Brand: SiS

    Category: Running Energy Nutrition

    Recommended by Robyn Lesh, Pro Trail Running Athlete — South Western Colorado

    The SiS BETA Fuel Gel - Neutral is a high-performance energy gel that provides 40g of carbohydrates in a single serving, ensuring you stay fueled during intense workouts without the hassle of multiple packets. Its unique formulation maximizes absorption while maintaining digestive comfort, making it the ideal choice for athletes seeking reliable energy support. 1. Delivers 40g of carbohydrates per gel for efficient energy replenishment. 2. Features a 1:0.8 dual-source carbohydrate ratio to enhance absorption and reduce gastrointestinal discomfort. 3. Smooth texture that is easy to consume, avoiding the thick, syrupy feel of traditional gels. 4. Neutral flavor profile designed to be palatable during strenuous activities without overwhelming your taste buds. 5. Compact packaging allows for easy storage and transport, perfect for athletes on the go. 6. Suitable for various endurance activities, including running, cycling, and triathlons. 7. No artificial colors or preservatives, aligning with health-conscious consumers' preferences. The SiS BETA Fuel Gel - Neutral is designed for endurance athletes looking to maintain energy levels during prolonged physical activities. It excels in high-intensity environments, such as marathons or long-distance cycling events, where quick and effective fueling is crucial. Ideal for both amateur and professional athletes, this gel is perfect for training sessions and competitions alike, ensuring optimal performance without digestive issues.

    Price: $3.99

    Expert Review

    15% off: ROBYNRUNS 40g carb in a small volume. The Neutral flavor has not much/no taste (which I prefer). I empty these into the hydrapac nutrition flasks and the combo makes nutrition SO much easier to get down.

    Recommended by Robyn Lesh

    Frequently asked questions

    What does Robyn Lesh say about the SiS BETA Fuel Gel - Neutral?

    15% off: ROBYNRUNS 40g carb in a small volume. The Neutral flavor has not much/no taste (which I prefer). I empty these into the hydrapac nutrition flasks and the combo makes nutrition SO much easier to get down.

    Why does Robyn Lesh recommend SiS?

    Robyn Lesh recommends the SiS SiS BETA Fuel Gel - Neutral for running energy nutrition. 15% off: ROBYNRUNS 40g carb in a small volume. The Neutral flavor has not much/no taste (which I prefer). I empty these into the hydrapac nutrition flasks and the combo makes nutrition SO much easier to get down.

    Is the SiS BETA Fuel Gel - Neutral a good running energy nutrition?

    Yes — Robyn Lesh recommends the SiS BETA Fuel Gel - Neutral by SiS as their running energy nutrition pick. 15% off: ROBYNRUNS 40g carb in a small volume. The Neutral flavor has not much/no taste (which I prefer). I empty these into the hydrapac nutrition flasks and the combo makes nutrition SO much easier to get down.

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    SiS BETA Fuel Gel - Neutral by SiS — recommended by Robyn Lesh
    Nutrition & Hydration

    SiS BETA Fuel Gel - Neutral

    Robyn Lesh
    Robyn LeshRecommended in “CCC by UTMB”
    15% off: ROBYNRUNS 40g carb in a small volume. The Neutral flavor has not much/no taste (which I prefer). I empty these into the hydrapac nutrition flasks and the combo makes nutrition SO much easier to get down.
    Purchasing through this link directly supports Robyn
    Nutrition & Hydration

    SiS BETA Fuel Gel - Neutral

    Robyn Lesh
    Robyn LeshRecommended in “CCC by UTMB”
    15% off: ROBYNRUNS 40g carb in a small volume. The Neutral flavor has not much/no taste (which I prefer). I empty these into the hydrapac nutrition flasks and the combo makes nutrition SO much easier to get down.
    Purchasing through this link directly supports Robyn
    SiS BETA Fuel Gel - Neutral by SiS — recommended by Robyn Lesh

    This product is for…

    Endurance athletes doing long efforts (100Ks, long runs, racing) who need high-carb fueling and a stomach-friendly gel. Works well for those who prefer neutral or low-sweetness flavors and want something easy to get down in volume.

    Worth noting…

    The Nootropics Beta variant has a yellow stripe and contains 200mg caffeine — easy to confuse with the standard version. Can be emptied into soft flasks for easier consumption on the go; no caffeine in the standard gel.

    More from Robyn Lesh's CCC by UTMB

    • Sidas Trail running socks - Trail Ultra
    • Sidas Anti-friction cream
    • COROS Heart Rate Monitor
    • COROS APEX 4 White 42mm
    • Precision Fuel - Carb Only Drink Mix - 30 Serving
    • Black Diamond Soft Flask W-MX 500 mL
    • AONIJIE Trekking Pole Holder – Compatible with C9116 Hydration Pack-E4433
    • Shokz OpenSwim Pro Headphones

    View Robyn Lesh's expert gear recommendations on Rendezvu