Protein

Protein is essential for endurance athletes, to ensure your muscles are rebuilt after your activity. Protein products are designed to suit every goal and budget, including Whey Protein, our premium Whey Protein Advanced Isolate +, great tasting Overnight Protein, delicious Protein Bars and the biggest innovation in protein for years – WHEY20. All available in a wide range of sizes and flavours!

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  1. SiS PLANT20 Bar - 12 Pack
    +3Flavours
  2. SiS PLANT20 Powder - 900g
    +3Flavours
  3. SiS Recovery Bundle
    SiS Recovery Bundle
    Save 30%
    Was £122.00 £85.40
    0 Reviews
  4. SiS Whey Protein Tub - 1kg
    +4Flavours
    SiS Whey Protein Tub - 1kg
    Save 20%
    Special Price £24.00 Was £30.00
    65 Reviews
  5. SiS PLANT20 Bar - 64g
    +3Flavours
  6. SiS PROTEIN20 - 12 Pack
    +3Flavours
  7. SiS PROTEIN20 Bar Bundle
    SiS PROTEIN20 Bar Bundle
    Save 20%
    Was £15.00 £12.00
    0 Reviews
  8.  SiS Protein Bar - 20 Pack
    +2Flavours
    SiS Protein Bar - 20 Pack
    Save 20%
    Special Price £32.00 Was £40.00
    53 Reviews
  9. SiS PLANT20 Bundle
    SiS PLANT20 Bundle
    Save 30%
    Was £45.00 £31.50
    0 Reviews
  10. 700ml SiS Protein Shaker
    SiS Shaker Bottle - 700ml
    Save 10%
    Special Price £4.50 Was £5.00
    20 Reviews
  11. SiS PROTEIN20 - 55g
    +3Flavours
  12. SiS Protein Bar - 55g
    +2Flavours
  13. SiS Advanced Isolate+ Protein Powder - 1kg
    +2Flavours
    SiS Advanced Isolate+ Protein Powder - 1kg
    Save 20%
    Special Price £36.00 Was £45.00
    22 Reviews
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