Bestsellers

At Science in Sport, we’re committed to research, testing, and certification. By working with the elite athlete community, we create performance-driven products that meet your nutritional needs and support your training goals. 

 

Our best-selling products are widely trusted across the globe, helping ambitious athletes from a wide range of disciplines to take their training to the next level. Through our world-leading and relentless research, we formulate products that will truly impact your performance. Discover the benefits of SiS today with our best-selling products. 



Innovative fuelling solutions

 

All Science in Sport products are specially formulated to help endurance athletes take their sport to the next level. From energy and hydration to supporting your recovery, our innovative solutions are fuelled by science, designed to fuel your performance. 

 

Committed to quality

 

We work with sporting professionals and athletes from all over the world to create performance nutrition solutions that are thoroughly tried and tested. Our range of best-selling products contain the best available ingredients for your nutritional needs, working to boost your energy, hydration, recovery and overall well being. 

 

Shop best-selling products at Science in Sport

 

When you dedicate so much of your time to your sport, you want the most innovative nutrition products available to help you level up your performance.

 

Our best-selling Science in Sport products are trusted all over the world, across a vast range of sports. But don’t just take our word for it! Discover our best-selling products today for world-class sports nutrition. 



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20 Products

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Price
  1. REGO Rapid Recovery Protein Powder
    REGO Rapid Recovery Protein Powder
    5 Flavours
    From £11.99
    Save 40%
    From £19.99
  2. GO Energy Bakes - 12 Pack
    GO Energy Bakes - 12 Pack
    4 Flavours
    From £12.60
    Save 40%
    From £21.00
  3. Recovery Bundle
    Recovery Bundle
    £72.00 Was £120.00
    Save 40%
  4. Hydro Tablets
    Hydro Tablets
    11 Flavours
    From £4.80
    Save 40%
    From £8.00
  5. 800ml SiS Cycling Drinks Bottle - Narrow Neck
    Bottle - 800ml
    Save 40%
    Special Price £3.00 Was £5.00
  6. go-isotonic-energy-gels-30-pack
    GO Isotonic Energy Gel
    8 Flavours
    From £5.25
    Save 40% - 61%
    From £10.50
  7. GO Energy + Electrolyte Gels
    GO Energy + Electrolyte Gels
    3 Flavours
    From £7.56
    Save 40% - 50%
    From £12.60
  8. SiS GO Isotonic Gel - Multi Flavour 30 Pack Bundle
    GO Isotonic Energy Gel - Multi Flavour 30 Pack Bundle
    £28.80 Was £48.00
    Save 40%
  9. Speciality Mixed Gel Bundle - 30 Pack (Multi Flavour)
    Speciality Mixed Gel Bundle - 30 Pack (Multi Flavour)
    £36.00 Was £60.00
    Save 40%
  10. GO Energy + Caffeine Gels
    GO Energy + Caffeine Gels
    3 Flavours
    From £6.60
    Save 40% - 50%
    From £13.20
  11. SIS Mixed Isotonic 20 Gel Pack
    Mixed GO Isotonic Energy Gels - 20 Pack
    Save 40%
    Special Price £20.40 Was £34.00
  12. REGO Cherry Juice - 20 Pack
    REGO Cherry Juice - 20 Pack
    Save 50%
    Special Price £15.00 Was £30.00
  13. GO Electrolyte Powder
    GO Electrolyte Powder
    3 Flavours
    From £7.20
    Save 40%
    From £12.00
  14. SiS GO Isotonic Gel 60ml 6 Pack Lemon & Lime
    GO Isotonic Energy Gel - 6 Pack (Lemon & Lime)
    Save 40%
    Special Price £6.30 Was £10.50
  15. protein bar, 20g protein, 0.7g sugar, 12 pack
    PROTEIN20 Bar - 12 pack
    2 Flavours
    From £19.80
    Save 40%
    From £33.00
  16. Endurance Hydration Bundle Pack - 4 x SiS GO Hydro 20 tabs
    Hydro & Immune Bundle
    £18.00 Was £30.00
    Save 40%