Endurance sports nutrition
Sports nutrition with a long history in endurance sport. From everyday training to demanding race days, SiS brings science and practical fuelling together.
Why we rate SiS
Customers asked us to stock Science in Sport, so we did. It is a respected name in endurance nutrition, with a history of developing fuel alongside professional athletes.
We like the no-nonsense side of SiS: clear carbohydrate amounts, practical formats and good value for regular training. BETA Fuel makes it easy to count what you carry and what you take on, so you can get on with your run or ride.
BETA Fuel Gel gives you 40g of carbohydrate in one 60ml sachet. Useful when you want portable fuel and prefer to manage your drinking separately.
Orange, Neutral and Strawberry & Lime. Single sachets, six-packs and 12-packs; check the product page for current availability.
BETA Fuel 80 gives you 80g of carbohydrate per powder sachet. Mix with 600ml water and sip as you go. Useful when a bottle is easy to reach.
Orange, Red Berry and Strawberry & Lime. Packs of 5, 10 or 15; check the product page for current availability.
Both use maltodextrin and fructose in a 1:0.8 ratio. That dual-source blend is intended for higher carbohydrate intakes during longer endurance exercise. The useful bit for your plan is still the number on the pack: 40g per gel, 80g per drink sachet. Include drinks, gels and food in the same total, then practice what works for you.
The story behind BETA Fuel
Science in Sport developed the original BETA Fuel drink with Team Sky. It was used at the 2018 Giro d’Italia, including Chris Froome’s Stage 19 ride, before its wider launch.
That work with professional riders is part of SiS’s endurance heritage. Today’s BETA Fuel range uses a 1:0.8 maltodextrin-to-fructose blend to support higher carbohydrate intakes during long, demanding sessions.
Science in Sport, usually shortened to SiS, is a sports nutrition brand that develops products for training and competition. It is well known in endurance sport for its work with professional athletes and teams, including the development of BETA Fuel with Team Sky.
BETA Fuel is the Science in Sport range designed for higher carbohydrate intake during endurance exercise. SiS BETA Fuel Gel provides 40g of carbohydrate per sachet, while BETA Fuel 80 provides 80g per drink sachet. Both use maltodextrin and fructose in a 1:0.8 ratio.
Customers asked if we could stock SiS, so we did. We like its straightforward carbohydrate amounts, practical formats and good value for regular endurance fuelling. Its work with professional athletes and independent product testing add to our confidence in the brand.
The gel gives you 40g of carbohydrate in a 60ml sachet. The drink gives you 80g from an 82g powder sachet mixed with 600ml water. Both use maltodextrin and fructose in a 1:0.8 ratio. Choose the gel for portable fuel, the drink when you can carry and reach a bottle, or a mix that you have tested in training.
Science in Sport developed the original BETA Fuel drink with Team Sky, which used it at the 2018 Giro d’Italia. SiS links the drink to Chris Froome’s Stage 19 ride. The BETA Fuel gel was a later addition to the range.
SiS has a documented history of developing fuel with professional athletes. The BETA Fuel gel and BETA Fuel 80 drink are also listed by Informed Sport, which provides independent banned-substance testing. Those are useful reasons for confidence. They do not guarantee that a product will suit your stomach or improve your result. If you compete under anti-doping rules, check the exact product and batch before use.
Yes. Count the carbohydrate from everything you actually consume. One full BETA Fuel 80 drink plus one 40g gel gives 120g in total; half that drink plus one gel gives 80g. Those are totals, not instructions to consume that amount every hour. Match your plan to the session and what you have comfortably used in training.
Mix one full 82g sachet with 600ml water and shake until dissolved. Sip little and often. The drink we stock lists 0g salt per serving, so treat it as carbohydrate fuel rather than a sodium-replacement drink. Plan any additional fluid and sodium around your session, conditions and tested needs.
The standard SiS BETA Fuel Gel and BETA Fuel 80 drink are caffeine-free. BETA Fuel + Nootropics is a separate product that contains caffeine, so check the full product name and label when choosing.
We think it is good value for a high-carbohydrate endurance range. Start with a single gel or a five-sachet drink pack if you are trying it for the first time. Compare the current pack price and number of servings once you know what works for you. A larger pack is only useful if you will use it.
No. BETA Fuel is most relevant to longer or more demanding endurance sessions. Normal meals and your usual drinking routine may cover a shorter, easier outing. For a long day, practice flavour, texture, timing and the amount you can comfortably tolerate before race day. More is not automatically better.
Use Fuel Finder to build a plan around your sport, duration, carrying space and preferences. Then test it on a training day before you rely on it in a race.
