59 Products
The benchmark for gels
Replenish glycogen stores - 87kcal
The benchmark for couriers
Caramelised banana flavour - Suitable for vegans
Enjoy as many outings as you like without getting tired – an exceptional offer
SIS Recovery Protein Powder
Absolutely brilliant, we love it!!!
Carbohydrates for the body - Nootropics for the mind
Maintain glycogen levels during exercise
The equivalent of a double espresso - Perfect for short, intense efforts
40g carbohydrates - Ratio 1:0.8 (maltodextrin to fructose)
Quick carbohydrate boost - 87kcal
The ideal gel for even longer performance
Rapid carbohydrate intake - 87kcal
Caffeine shot: boost effect - Ideal for long periods of exercise
45g carbohydrates - Glucose, fructose
Provides minerals and magnesium - Reduces fatigue
Dual energy source - Maltodextrin, fructose, carbohydrates
Rapid carbohydrate intake - Natural flavours
Quick and easy absorption
Gel to be consumed during exercise - Rich in carbohydrates and minerals - Beneficial effect on endurance
1.6kg tub - Carbohydrate and electrolyte blend
Carbohydrates for the body - Nootropics for the mind
Equivalent to 10 litres of energy
1.6kg pot - Mix of carbohydrates and electrolytes
SIS, partner of Team Ineos - Tablets rich in magnesium and mineral salts
Competition gels with a ratio of 1:0.8 and added electrolytes
Energy and digestive comfort
The go-to choice for gels
Vanilla, chocolate, strawberry - Muscle recovery
Flexible bottle with an ergonomic shape that is easy to grip
The largest capacity in the range
Equivalent to 10 litres of energy
With nootropics and caffeine
Combines protein and carbohydrate intake - Ideal for refuelling after a training session or competition
Rapid carbohydrate intake - Natural flavours
Ratio 1:0.8 – electrolytes
Protection against infectious germs
40g of carbohydrates and 10g of protein per bar
10g of protein and 40g of carbohydrates per bar
Delicious lemon/lime flavour - Energy boost or sports drink
The ultimate in hydration
Energy intake without eating, used by the pros
700ml shaker, ideal for mixing your drink
1200g of energy at the best price
Frequently asked questions
Yes, Science in Sport is recognised as the inventor of the world’s first isotonic gel: the GO Isotonic Energy Gel. Unlike traditional hypertonic gels, an isotonic gel can be consumed without additional water as its formulation is close to the osmolarity of blood. This eliminates the digestive discomfort associated with overly concentrated gels that require dilution. Since its launch, this gel has become a global benchmark in endurance nutrition.
GO Isotonic provides 22 g of carbohydrates per gel from a single source (maltodextrin), whilst Beta Fuel provides 40 g from two sources (ratio 1:0.8 maltodextrin to fructose). Beta Fuel is designed for sessions lasting over 2 hours where the aim is to consume 80 to 120 g of carbohydrates per hour: its dual-source carbohydrate blend improves intestinal absorption and reduces digestive problems. GO Isotonic is better suited to moderate-intensity exercise or to cyclists new to sports nutrition, as its lighter texture and smaller volume make it easier to consume without causing nausea.
Yes, this is a commonly reported issue: the Beta Fuel sachet can be difficult to tear open with your fingers whilst you’re in the middle of a strenuous ride. The recommended tip is to make a small cut at the top of the sachet with scissors before your race or long ride. This pre-cut allows for effortless one-handed opening whilst keeping the sachet sealed until use. SiS has gradually improved the opening mechanism on its newer sachet designs.
SiS recommends 80 to 120 g of carbohydrates per hour for prolonged, high-intensity exercise, equivalent to 2 to 3 Beta Fuel gels per hour. This high intake is possible thanks to the 1:0.8 maltodextrin-to-fructose ratio, which utilises two different intestinal transporters, allowing for a greater rate of absorption than with a single source. To achieve this level without digestive discomfort, gradual gut acclimatisation is recommended: start with 60 g/h and increase gradually over several weeks.
Yes: SiS products carry the Informed Sport certification, which guarantees anti-doping tests on every production batch. This certification is particularly important for competitors subject to WADA testing. SiS has been the nutrition partner of numerous WorldTour teams and professional athletes, including Chris Froome, whose famous solo climb on the 2018 Giro (Stage 19) is often associated with Beta Fuel.
Yes, Science in Sport was founded in the UK and has been listed on the stock exchange since 2013. The brand was created around a scientific approach to sports nutrition, with products developed in collaboration with researchers and elite athletes. SiS is distributed in over 90 countries and offers ranges for cycling, triathlon, running and all endurance sports.
SiS Go Hydro tablets replenish sodium, potassium and magnesium lost through sweating, helping to prevent cramps and dehydration. Each effervescent tablet dissolves in 500 ml of water to create a light, carbohydrate-free hydration drink. They are the ideal complement to energy gels without increasing the total carbohydrate load. In hot weather or during intense exercise, the recommended strategy for maintaining performance is to take 1 SiS Go Hydro tablet per 500 ml of water consumed.
Yes: SiS’s REGO (Recovery) range is designed to aid recovery with protein, carbohydrates and electrolytes. REGO Rapid Recovery contains 20 g of protein and 23 g of carbohydrates per serving, and is best consumed within 30 minutes after exercise. Consuming carbohydrates and protein quickly after exercise optimises muscle glycogen resynthesis and fibre repair. A vegan version (pea and rice protein) is available for cyclists following a plant-based diet.
Yes: SiS’s GO Energy Oat bars are designed to be eaten whilst cycling and have an easy-to-chew texture. Each bar provides around 40 g of easily digestible carbohydrates from oats. Oats provide a more gradual release of carbohydrates than pure maltodextrins, making them ideal for long rides at a moderate pace. They are a good complement to gels, offering a variety of textures during multi-hour cycle races.
Yes: SiS recommends combining products from its Beta Fuel range to achieve 80–120 g of carbohydrates per hour. In practice: 1 Beta Fuel gel (40 g) + 500 ml of Beta Fuel drink (80 g/500 ml) = 120 g of carbohydrates in 1 hour. This ‘mix and match’ approach allows you to vary the forms (liquid/solid) to prevent taste fatigue on very long rides. Always test your nutritional strategy in training before using it in competition.
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