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Sis

Developed for sports enthusiasts as well as profession athletes, Science in Sport presents its exertive range of nutritional and energy gels and powders. Fuel yourself to bring out the best in you.
Sports Nutrition
Protein
Shaker Bottles
Bars and Supplements
Sis SIS Beta Fuel Energy Chews - Box (6 Packs)

£14.99

Sis Go Isotonic Variety Energy Gels 20 Pack

£32.99

Sis SIS GO Hydro Electrolyte Drink - 20 x 8

£57.99RRP£63.99

Sis Go Isotonic Gel (30 Pack)

£54.99

Sis SIS Beta Fuel Gels - 30 pack

£59.99

Sis REGO Collagen Shot Apple - 12 Pack

£28.99

SisSIS Go Electrolyte Drink - 500g£15.99SisGO Hydro - 20 Tabs£7.00SisSIS Beta Fuel + Nootropics Gels - 30 pack£65.99SisSIS GO Energy Bake Bar (12 X 50g)£23.99SisSIS GO Hydro Electrolyte Drink - 20 x 8£57.99SisSIS Beta Fuel Gels - 30 pack£59.99SisSIS BETA Recovery Drink - 1.5kg£45.99SisSIS Beta Fuel Energy Chews - Box (6 Packs)£14.99SisSIS Go Electrolyte Drink - 500g£15.99SisGO Energy Drink - 1.6kg£31.99SisSIS Beta Fuel Energy Chews - Box (20 Packs)£49.99SisRego Cherry Juice (30 x 30ml)£53.99SisBeta Fuel 80 Energy Drink (Box of 15 Sachets)£39.99SisSIS Energy Oat Bar (12 x 70g)£29.99SisSIS Energy Oat Bar (12 x 70g)£29.99SisSIS BETA Recovery Drink - 1.5kg£45.99SisBeta Fuel 80 Energy Drink (Box of 15 Sachets)£39.99SisGO Gel + Caffeine (30 Pack)£64.99SisGO + Caffeine Gel 60ml£63.99SisSIS Creatine 400g / 72 Serving Tub£29.99SisGO Energy Drink - 1.6kg£31.99SisGO Energy Drink - 1.6kg£31.99SisGo Isotonic Gel (30 Pack)£54.99SisGo Isotonic Gel (30 Pack)£54.99SisGo Isotonic Gel (30 Pack)£54.99SisGo Isotonic Gel (30 Pack)£54.99SisGo Isotonic Gel (30 Pack)£54.99SisGo Isotonic Gel (30 Pack)£54.99SisSIS GO Hydro Electrolyte Drink - 20 x 8£57.99SisSIS GO Hydro Electrolyte Drink - 20 x 8£57.99SisSIS GO Hydro Electrolyte Drink - 20 x 8£57.99SisSIS GO Hydro Electrolyte Drink - 20 x 8£57.99SisBeta Fuel + Electrolyte Gels - 30 pack£68.99SisSIS Hydro+ Electrolyte Drink Mix - ( 20 x 4.5g Sti£26.99SisSIS Hydro+ Electrolyte Drink Mix - ( 20 x 4.5g Sti£26.99SisSIS Hydro+ Electrolyte Drink Mix - ( 20 x 4.5g Sti£26.99SisSIS Beta Fuel + Nootropics Gels - 30 pack£65.99SisRego Clear - 1.38kg£53.99SisRego Clear - 1.38kg£53.99SisRego Whey - 1.35kg£53.99SisRego Whey - 1.35kg£53.99SisSIS Rego Rapid Recovery Drink - 1.5kg£45.99SisSIS Rego Rapid Recovery Drink - 1.5kg£45.99SisSIS Rego Rapid Recovery Drink - 1.5kg£45.99SisSIS Beta Fuel Gels - 30 pack£59.99SisSIS BETA Recovery Drink - 1.5kg£45.99SisSIS GO Caffeine Shot Cola - 12 pack£25.99SisSIS Go Electrolyte Drink - 500g£15.99SisSIS GO Energy Bake Bar (12 X 50g)£23.99SisBeta Fuel 80 Energy Drink (Box of 15 Sachets)£39.99SisGO Gel + Caffeine (30 Pack)£64.99SisGO Gel + Caffeine (30 Pack)£64.99

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Representative APR: 29.9% (variable)

Credit subject to status. Terms apply.
Missed payments may affect your credit score.

Use Code: FF20

T&Cs Apply

20% off Full Price*
Use Code: FF20

United Kingdom

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© 2026 Frasers Group Trading Limited.

Frasers Group Trading Limited. (FRN: 980401), trading as ‘Sports Direct’ is an appointed representative of Frasers Group Financial Services Limited (FRN: 311908) who are authorised and regulated by the Financial Conduct Authority as a lender. Frasers Plus is a credit product provided by Frasers Group Financial Services Limited and is subject to your financial circumstances. For regulated payment services, Frasers Group Financial Services Limited is a payment agent of Transact Payments Limited, a company authorised and regulated by the Gibraltar Financial Services Commission as an electronic money institution. Missed payments may affect your credit score and mean your 0% interest plans end. * Exclusive access to discounts on selected products for Frasers Plus customers before everyone else.