Best Sellers

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.

 

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10 Products

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Price
  1. Protein20 lavoured bar designed for on-the-go with 20g of protein and 0.5g-0.7g of sugar per bar depending on flavour.
    PROTEIN20 Bar - 12 pack
    2 Flavours
    From £33.00
  2. SIS Mixed Isotonic 20 Gel Pack
    Mixed GO Isotonic Energy Gels - 20 Pack
    Save 50%
    Special Price £16.99 Was £34.00
  3. SiS Immune - 8 Pack (Orange)
    SiS Immune - 8 Pack (Orange)
    Save 20%
    Special Price £52.00 Was £65.00
  4. Go Hydro (Pink Grapefruit)
    Go Hydro (Pink Grapefruit)
    Save 20%
    Special Price £6.40 Was £8.00
  5. 800ml SiS Pro Yellow Cycling Bottle
    Pro Yellow Bottle - 800ml
    Save 20%
    Special Price £4.00 Was £5.00
  6. Vitamin C designed to reduce tiredness and fatigue and also giving you immune support. Each tub has 60 tablets with a suggested use of 1 per day.
    Vitamin C
    Save 57%
    Special Price £2.99 Was £6.99
  7. Immune Tablets Orange - 20 Tablets
    Immune Tablets Orange - 20 Tablets
    Save 20%
    Special Price £6.80 Was £8.50
  8. GO Hydro (Lemon)
    GO Hydro (Lemon)
    Save 20%
    Special Price £6.40 Was £8.00
  9. Beta Fuel Energy Chew
    Beta Fuel Energy Chew
    6 Flavours
    From £2.20
  10. Go Hydro (Pineapple & Mango)
    Go Hydro (Pineapple & Mango)
    Save 20%
    Special Price £6.40 Was £8.00
16 33 48 View All

10 Products

Premier Delivery Just £9.99 For A Year Of Next Day Delivery!