Protein Range

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!

Grid List

29 Item(s)

  • SiS Protein Bar 55g 20 Pack Chocolate & Peanut

    Protein Bar - 20 Pack (Chocolate & Peanut)

    009169
    1

    £40.00
  •  Whey Protein - 1kg (Pineapple & Coconut)

    Whey Protein - 1kg (Pineapple & Coconut)

    100304
    2

    £30.00
  •  Advanced Isolate+ - 1kg Mint (Chocolate)

    Advanced Isolate+ - 1kg Mint (Chocolate)

    100010
    3

    £45.00
  • BCAA Shot - Single (Pink Grapefruit)

    BCAA Shot - Single (Pink Grapefruit)

    100241
    4

    £2.00
  •  WHEY20 - 12 Pack (Chocolate Orange)

    WHEY20 - 12 Pack (Chocolate Orange)

    200702
    5

    £27.50
  • BCAA Shot - 6 Pack (Pink Grapefruit)

    BCAA Shot - 6 Pack (Pink Grapefruit)

    200241
    6

    £11.00
  • SiS Whey Protein 1kg Chocolate

    Whey Protein Powder 1kg Tub - Chocolate

    015115
    7

    £30.00
  • SiS WHEY20 78ml Mixed 4 Pack - Strawberry & Lemon

    WHEY20 Mixed - 4 Pack (Chocolate Orange & Caramel)

    200705
    8

    £9.00
  • SiS Whey Protein 1kg Strawberry

    Whey Protein Powder 1kg Tub - Strawberry

    015016
    9

    £30.00

    Out of stock

  •  WHEY20 - 12 Pack (Lemon)

    WHEY20 - 12 Pack (Lemon)

    100068
    10

    £27.50
  • SiS Whey Protein 1kg Vanilla

    Whey Protein - 1kg (Vanilla)

    015719
    11

    £30.00
  •  Advanced Isolate+ - 1kg (Chocolate Orange)

    Advanced Isolate+ - 1kg (Chocolate Orange)

    100001
    12

    £45.00
  •  WHEY20 - 12 Pack (Strawberry)

    WHEY20 - 12 Pack (Strawberry)

    100069
    13

    £27.50
  •  Overnight Protein - 1kg (Chocolate)

    Overnight Protein - 1kg (Chocolate)

    016112
    14

    £48.00
  • BCAA Shot - Single (Lemon)

    BCAA Shot - Single (Lemon)

    100240
    15

    £2.00
  •  Overnight Protein - 1kg (Cookies and Cream)

    Overnight Protein - 1kg (Cookies and Cream)

    100303
    16

    £48.00
  •  Overnight Protein - 1kg (Vanilla)

    Overnight Protein - 1kg (Vanilla)

    016716
    17

    £48.00
  • BCAA Shot - 6 Pack (Lemon)

    BCAA Shot - 6 Pack (Lemon)

    200240
    18

    £11.00
  • Performance Greens - 210g (Mango)

    Performance Greens - 210g (Mango)

    100379
    19

    £20.00
  • WHEY20 78ml 8 Pack Bundle - (Choose your Flavours)

    WHEY20 78ml 8 Pack Bundle - (Choose your Flavours)

    sis-bundle-26t
    20

    £18.00
  • Protein Bar Bundle

    Protein Bar Bundle

    protein-bar-bundle
    21

    £12.00
  • SiS BCAA Perform - 250g (Pineapple)

    BCAA Perform - 250g (Pineapple)

    100305
    22

    Regular Price: £18.00

    Special Price £9.99

    Out of stock

  • SiS BCAA Perform - 250g (Summer Fruits)

    BCAA Perform - 250g (Summer Fruits)

    100306
    23

    Regular Price: £18.00

    Special Price £9.99

  •  Creatine - 400g (Orange)

    Creatine - 400g (Orange)

    100307
    24

    Regular Price: £10.00

    Special Price £6.99

  • SiS Creatine Monohydrate - 400g (Unflavoured)

    Creatine - 400g (Unflavoured)

    100308
    25

    Regular Price: £10.00

    Special Price £6.99

  •  Beta Alanine - 150 Tablets (Unflavoured)

    Beta Alanine - 150 Tablets (Unflavoured)

    100600
    26

    Regular Price: £20.00

    Special Price £12.99

  • SiS Glutamine - 400g (Unflavoured)

    L-Glutamine - 400g (Unflavoured)

    100309
    27

    Regular Price: £18.00

    Special Price £9.99

  • Whey Protein Shake & Take - Chocolate

    Whey Protein Shake & Take - Chocolate

    103005
    28

    £1.75
  • Whey Protein Shake & Take - Strawberry

    Whey Protein Shake & Take - Strawberry

    103006
    29

    £1.75

Grid List

29 Item(s)