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SIS
SIS Go Gel - 30 Pack
A convenient and fast-acting source of liquid carbohydrate, best taken during intense exercise when energy is needed to maintain performance & prevent the onset of fatigue. The isotonic formula means the gel can be used as part of your fuelling strategy without the liquid volume that often leaves you feeling bloated and sluggish. The GO Isotonic Energy Gel is formulated to rapidly deliver 22g of carbohydrate as a source of fast-acting energy when you need it most.
£51.00 excl VAT
SIS Go Gel + Electrolytes - 30 Pack
GO ENERGY + Electrolytes combines fuelling and hydration to create an innovative nutrition solution. 22g of carbohydrates helps maintain energy levels during endurance exercise and electrolytes help to buffer against fatigue whilst supporting hydration. The GO Energy + Electrolyte Gel is a liquid carbohydrate energy + electrolyte gel that helps maintain the body's fluid balance and provide fast-acting energy.
£54.00 excl VAT
SIS GO Gel + Caffeine - 30 Pack
GO Energy + Caffeine adds a physical and mental boost to exercise fuelling. 22g of carbohydrates maintain energy levels during exercise and 75mg of caffeine provides extra alertness when fatigued. A convenient and fast-acting source of 22g liquid carbohydrate with added caffeine.
£64.50 excl VAT
NEW: SIS Go Gel Variety Pack - 20 Pack
Contents: 4 x each flavour GO Isotonic Energy Gels (Orange, Tropical, Blackcurrant, Lemon & Lime, Apple) The GO Isotonic Gel is the world's first isotonic gel effectively delivering an easily digestible and quick supply of carbohydrate for energy during exercise. GO Isotonic Gels are designed to be consumed without water meaning that you can ensure rapid delivery of carbohydrate to your muscles
£33.00 excl VAT
SIS Beta Fuel Gels - 30 pack
A dual-source, high-carbohydrate energy gel designed for endurance athletes undertaking longer sessions. BETA Fuel Energy Gel is a superior fuelling solution delivering 40g carbohydrate in a 1:0.8 maltodextrin-to-fructose ratio.
£60.00 excl VAT
SIS Beta Fuel + Nootropics Gels - 30 pack
The innovative BETA Fuel Energy Gel + Nootropics combines 40g dual source carbohydrate with 250mg Cognizin® Citicoline, 1g L-Taurine, 200mg caffeine and 200mg of the amino acid L-Theanine to improve both your physical and mental performance.
£66.00 excl VAT
NEW: SIS Beta Fuel + Electrolyte Gels - 30 pack
A dual-source energy gel with added electrolytes for endurance For athletes engaging in prolonged moderate to high-intensity exercise, >2 h in duration, to simultaneously deliver both carbohydrate and key electrolytes for when you need it most.
£69.00 excl VAT
SIS GO Hydro Electrolyte Drink - 20 Tablet Tube (8 Pack)
A convenient effervescent tablet that is high in sodium and vitamins to support everyday hydration.. Hydration counts every time. HYDRO is a solution to everyday hydration, designed to support daily life and exercise performance. High sodium content helps to replace key electrolytes lost through sweat.
£53.33 excl VAT
SIS Hydro+ Electrolyte Drink Mix - ( 20 x 4.5g Stick Box)
Featuring five key electrolytes and three essential vitamins blended to create a scientifically supportive dose for optimal hydration. Packaged in convenient single use sachets, HYDRO+ fits easily in your bag or pocket, the perfect electrolyte drink for those with an active lifestyle always on the go.
£25.00 excl VAT
SIS Hydro+ Electrolyte Drink Mix - ( 6 x 4.5g Stick Box)
Featuring five key electrolytes and three essential vitamins blended to create a scientifically supportive dose for optimal hydration. Packaged in convenient single use sachets, HYDRO+ fits easily in your bag or pocket, the perfect electrolyte drink for those with an active lifestyle always on the go.
£6.67 excl VAT
SIS IMMUNE Multi Vitamin Drink - 20 Tablet Tube (8 Pack)
As an effervescent tablet that readily dissolves in water, IMMUNE represents a highly practical approach to support immunity, containing a formulation of Vitamin C (200 mg) and Iron (2.5 mg) which are known to contribute to the maintenance of the normal function of the immune system.
£53.33 excl VAT
SIS Energy Oat Bar (12 x 70g)
Whether you're powering through a morning run, prepping for an afternoon workout, or recovering post-game, the Energy Oat Bar is the delicious snack to support your performance.
£25.00 excl VAT
SIS Mini Go Bar - Box (30 x 40g Bars)
A nutritious and high-carbohydrate bar made from real fruit to provide 26g of carbohydrates. GO Energy bar provides 26g of carbohydrates in a compact bar derived from a single-source maltodextrin carbohydrate made with real fruit. 4.5g of protein helps you meet your daily protein requirements and aid recovery.
£42.00 excl VAT
SIS GO Energy Bake Bar (12 X 50g)
SIS Go Energy Bake Bar (12 X 50g) - 30 g carbohydrate - 10 g fructose - 2:1 carbohydrate ratio - Soft filled bake - Fruit centre - Fuelling before or during exercise - Energy loading snack between meals - Informed Sport tested
£24.00 excl VAT
SIS Protein20 Vegan Bar (12 x 64g Bars)
Key Features: • Low sugar, high protein bar • 20 g of protein per bar • 2 g of sugar per bar • Supports recovery, muscle rebuild and daily protein intake • Post-exercise • Day-to-day snacking • Vegan
£29.00 excl VAT
SIS Beta Fuel 80 Energy Drink - Box (15 Sachets)
SIS Beta Fuel 80 Energy Drink - Box (15 Sachets)
£37.50 excl VAT
SIS Beta Fuel Energy Chews - Box (20 Packs)
Our Beta Fuel Dual Source Energy Chews deliver scientifically superior fuel in unique and satisfying chews. They are super easy to consume and deliver 46 grams of carbohydrate to improve and maintain optimum performance.
£41.67 excl VAT
SIS Beta Fuel Energy Chews - Box (6 Packs)
Our Beta Fuel Dual Source Energy Chews deliver scientifically superior fuel in unique and satisfying chews. They are super easy to consume and deliver 46 grams of carbohydrate to improve and maintain optimum performance.
£12.50 excl VAT
SIS BETA Recovery Drink - 500g
SIS BETA Recovery Drink - 500g BETA Recovery Dual Source Recovery Drink. Advanced carbohydrate & protein blend, scientifically formulated to support recovery after endurance exercise.
£16.67 excl VAT
SIS BETA Recovery Drink - 1.5kg
SIS Rego Recovery Drink - 1.5kg BETA Recovery Dual Source Recovery Drink. Advanced carbohydrate & protein blend, scientifically formulated to support recovery after endurance exercise.
£41.67 excl VAT
NEW SIS Rego Clear - 46g Sample Sachet (one of each flavour per customer)
SIS Rego Clear - 46g
£0.00 excl VAT
SIS Rego Cherry Juice (30 x 30ml)
Montmorency cherries are a specific variety of sour cherry, which gives the natural tart flavour. Cherry juice research is linked to improved recovery, reductions in delayed onset muscle soreness, reduced inflammation and improved sleep. Training and competition places considerable stress on the body, and scenarios exist where a goal of accelerated recovery is more important than physiological adaptation. At these times, individuals may be required to perform multiple training sessions or competitive events within or on consecutive days, and recovery protocols are key in maintaining optimal performance. Key Features: • 100% Montmorency cherry • Naturally rich in anthocyanins, flavonoids and melatonin • Supports recovery, reduces inflammation and aids sleep • Informed Sport tested
£60.00 excl VAT
SIS Creatine 400g / 72 Serving Tub
Creatine is the latest addition to the range, offering a convenient way to help increase physical performance. Add the unflavored variety to an whey protein shake or Rapid Recovery or enjoy the flavored creatine with water. Creatine uptake to muscle is enhanced by insulin and muscle contraction so we should be saying consume with food and in the post-exercise period in combination with our key recovery products.
£24.99 excl VAT
SIS GO Caffeine Shot Cola - 12 pack
SIS GO Caffeine Shot The new Caffeine Shot is perfect for use before or during exercise and is designed to help you maintain focus and concentration while reducing tiredness and fatigue. Whether it's before you hit the gym, to help you through those last few miles or to give you a half-time boost, the SiS GO Caffeine Shot will help improve your endurance and give you the edge over the competition. Each shot is 60ml and contains 150mg of caffeine alongside a mixture of vitamins & minerals all perfectly formulated to boost your endurance. Available in Cola and Tropical flavours.
£20.00 excl VAT
SIS 2.2 Litre Water Jug: OUT OF STOCK
Made with tough BPA-free plastic, our SiS 2.2L Water Jug is a water bottle with a large capacity for easy hydration on-the-go that provides a great alternative to single-use plastic bottles so you can do your bit for the planet.
£8.33 excl VAT
SiS Double Walled Stainless Steel Shaker - 750ml
Robust and durable, our stylish SiS Double Wall Stainless Steel Shaker is an insulated sports bottle with multiple features and has a large 750ml capacity designed for the easy mixing, transporting and drinking of SiS powdered drinks supplements.
£8.33 excl VAT
SiS Shaker Drinks Bottle - 700ml
CLICK BELOW FOR SIMILAR APPLIED NUTRITION SHAKER AT SAME PRICE. The Science in Sport shaker features the unique Easy Mix System. This has been designed to deliver fast and accurate mixing. The Easy Mix System enables you to pour specific amounts of Science in Sport powder directly into the shaker by using the pre-determined marks printed on the outside of the shaker.
£5.83 excl VAT
SiS Team Ineos Fly Bottle 500ml
SiS Team Ineos High Quality 500ml Fly bottle. Super lightweight and easy to use.
£6.66 excl VAT
SIS - Wholesale B2B Supplier UK
Science in Sport (SIS) Wholesale Sports Nutrition
Science in Sport (SIS) is a performance nutrition brand built around evidence-led formulation, rigorous testing, and real-world results. Trusted across endurance sport for fuelling and hydration, SIS delivers practical, competition-ready products that help athletes train harder, race smarter, and recover faster - making it a high-confidence, high-turnover brand for retailers, sports venues, clubs, and teams.
Provenance, Mission & Credibility
Born from sports science and developed for elite performance environments, SIS has long been associated with professional sport and endurance competition. The brand's mission is simple: translate quality research into products that are effective, easy to use, and consistent from batch to batch - backed by a reputation for reliability when it matters most.
The Science Behind SIS
SIS focuses on carbohydrate delivery, electrolyte balance, and recovery support using formats designed for absorption and gut comfort under load. Flagship ranges are engineered around measurable performance needs - rapid energy availability during exercise, hydration support for varying conditions, and post-session recovery nutrition. Many products are designed for straightforward dosing, clear on-pack guidance, and compatibility with common training plans.
Who SIS Is For
SIS is for endurance athletes at every level, from first-time event participants to competitive racers and elite squads. It's especially popular with athletes who want simple, proven fuelling they can trust during long sessions, high-intensity efforts, and multi-hour racing.
Popular Sports & Use Cases
SIS is widely used in running, cycling, triathlon, swimming, and team endurance environments. It performs strongly in both daily training and event-day settings, making it suitable for retail shelves, gym and pool concessions, club shops, and team performance programs.
Brand USPs for Your Business
For wholesale buyers, SIS offers a combination of strong brand recognition, repeat purchase behavior, and clear product segmentation across energy, hydration, and recovery. The approachable flavour profiles, convenient formats, and science-led messaging support easy staff recommendations and confident customer choices - helping increase basket size through complementary purchases across the fuelling journey.
Athlete & Elite Sport Association
SIS is well known for its presence in elite sport and professional endurance settings, reinforcing credibility at point of sale. That performance association helps retailers and teams align with a brand that consumers already perceive as trusted, tested, and race-ready.
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