Which SiS Powder Should You Use for Your Session?

11th Sep 2026

GO Energy, GO Electrolyte, and BETA Fuel are designed for different endurance needs based on session duration, conditions, and hydration requirements. GO Energy suits shorter sessions where carbohydrate is the priority, while GO Electrolyte adds sodium for hot or high-sweat conditions, and BETA Fuel supports longer sessions with higher carbohydrate intake. Choose the powder that best matches your session demands and fuelling strategy.

Key Takeaways

GO Energy Tub provides 47g of carbohydrate per serving and suits sessions lasting 60–90 minutes.
GO Electrolyte Sports Fuel adds a sodium-based electrolyte blend to its carbohydrate content, suiting hot sessions or high sweat-rate athletes.
BETA Fuel 80 Sachet delivers 80g of carbohydrate per serving via a dual-source 1:0.8 maltodextrin-to-fructose ratio, supporting higher absorption rates during extended efforts.
Match the powder to session length, intensity, and hydration needs rather than using one product for every scenario.
Gut training during preparation is essential for athletes using high-carbohydrate products like BETA Fuel, to ensure tolerance on race day.
Science in Sport states that its Australian products are Informed Sport registered; verify the exact product and batch before use. See health, safety and TGA compliance for further information.

How Do GO Energy, GO Electrolyte, and BETA Fuel Compare?

Product	Carbs per Serving	Calories per Serving	Best Use Case
GO Energy Tub	47g	189 kcal	Sessions of 60–90 minutes
GO Electrolyte Sports Fuel	36g	146 kcal	Hot or sweat-heavy sessions
BETA Fuel 80 Sachet	80g	320 kcal	Efforts over two hours

Why Does Choosing the Right Energy Powder Matter?

An energy powder that delivers the wrong carbohydrate quantity, or lacks electrolytes when conditions demand them, can reduce output and increase fatigue during training or competition. Science in Sport formulates each of its three carbohydrate powders for a specific performance scenario rather than as interchangeable generic supplements, so matching the product to the session is what determines whether it delivers its intended benefit.

What Is GO Energy Tub Best Used For?

GO Energy Tub delivers fast-absorbing carbohydrates for sessions of 60–90 minutes. Each 50g serving provides 47g of carbohydrate and 189 kcal. Mixed with 500ml of water and taken every 45–60 minutes, it suits road cycling, running, and team sport where carbohydrate availability matters more than electrolyte replacement, and it is also commonly used for carbohydrate loading in the days before an event.

What Is GO Electrolyte Sports Fuel Best Used For?

GO Electrolyte Sports Fuel provides 36g of carbohydrate per serving alongside a sodium concentration of 20 mmol/L (around 460mg per litre), combining fuelling and hydration in one product. It suits hot-weather training, indoor cycling, or any discipline with an elevated sweat rate, and may help athletes prone to cramping or higher sodium loss. For sessions long enough to need both sustained carbohydrate and active fluid replacement, it can be paired with dedicated hydration products such as electrolyte powders or hydro tablets.

What Is BETA Fuel 80 Sachet Best Used For?

BETA Fuel 80 Sachet is designed for sessions and races beyond two hours. Each serving provides 80g of carbohydrate using a 1:0.8 ratio of maltodextrin to fructose, a dual-source formulation that uses two separate intestinal transport pathways to raise the absorption rate. Single-source products are typically limited to one transport mechanism, saturating around 60g per hour, while the dual-source approach lets gut-trained athletes work toward 120g per hour, supporting higher energy availability in ultra-endurance efforts. It is used by marathon, triathlon, long-distance cycling, and Ironman-distance athletes, and pairs with the BETA Fuel + Nootropics Gel for portable on-course delivery or the Endurance Fuel Pack as a complete fuelling solution.

How Should You Apply This to Training and Racing?

Selecting the right powder is only one part of a complete fuelling approach; timing, mixing concentration, and gut training all affect whether it delivers its intended benefit. Fuelling should begin early, with carbohydrate starting within the first 30 minutes to help maintain blood glucose and delay glycogen depletion, and should be practised at race-realistic intensities, since gut tolerance under competitive conditions differs from easy training. Sticking to the recommended mixing concentration matters too: too strong raises GI discomfort risk, too weak reduces carbohydrate and electrolyte delivery per serve. For race-day planning, Sports Dietitians Australia and the Australian Institute of Sport both publish evidence-based frameworks for carbohydrate fuelling.

What Is the Simplest Way to Choose Between the Three?

GO Energy, GO Electrolyte, and BETA Fuel each serve a distinct purpose: GO Energy for 60–90 minute sessions where carbohydrate delivery is the priority, GO Electrolyte for warm conditions or sweat-heavy sport, and BETA Fuel for long efforts where maximising carbohydrate absorption matters most. First-time marathon or triathlon athletes may find the Marathon Fuel Pack a practical way to trial products before committing to individual purchases.

Find Your Powder and Start Fuelling Smarter

Science in Sport powders are formulated for performance, tested through Informed Sport certification, and used by elite athletes across multiple disciplines. Explore the full range and build a fuelling plan that matches your sessions and goals.

Frequently Asked Questions

1. What is the difference between GO Energy and GO Electrolyte?

GO Energy Tub provides fast-absorbing carbohydrates for sessions of 60–90 minutes. GO Electrolyte Sports Fuel offers a similar carbohydrate contribution plus a sodium-based electrolyte blend for sessions with significant fluid and sodium loss. GO Energy suits shorter or cooler efforts; GO Electrolyte suits sessions where heat, sweat rate, or duration make hydration a priority too.

2. Can BETA Fuel be used with other Science in Sport products?

Yes. BETA Fuel 80 Sachet combines well with other products, such as energy gels or caffeinated options like the GO Caffeine Shot, to build a complete race-day plan. Total carbohydrate intake across all products should stay within what the gut is trained to tolerate, especially early in long events.

3. How do you know which powder is right for a given session?

Session duration is the best starting guide: GO Energy suits efforts up to 90 minutes, GO Electrolyte suits similar-length sessions where hydration matters too, and BETA Fuel suits efforts of two hours or more. Adjust for temperature, sweat rate, and gut tolerance, and test the plan across several training sessions before race day.

4. Are these powders safe to use regularly?

Yes. All three are formulated for use during or around physical activity and produced to Informed Sport standards, with each batch tested for substances banned in sport. They are designed to supplement carbohydrate and electrolyte intake around exercise, not replace balanced whole-food nutrition across the day.

5. Do these powders come in different flavours?

Yes. Science in Sport offers a range of flavours across the GO Energy, GO Electrolyte, and BETA Fuel lines. Rotating flavours during long training blocks can help reduce flavour fatigue for athletes doing multiple long sessions a week.

6. What carbohydrate rate is achievable with BETA Fuel?

BETA Fuel's 1:0.8 maltodextrin-to-fructose ratio uses two separate intestinal transport pathways at once. Gut-trained athletes may work toward absorbing up to 120g of carbohydrate per hour combining BETA Fuel with other sources, built up gradually in training rather than attempted first on race day.