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 – SiS WHEY20.

Grid List

25 Item(s)

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

    SiS WHEY20 Mixed 4 Pack (Strawberry & Lemon)

    100070
    1

    Regular Price: £8.99

    Special Price £6.99

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

    SiS WHEY20 - Mixed 4 Pack (Chocolate Orange and Caramel)

    200705
    2

    Regular Price: £8.99

    Special Price £6.99

  • SiS Whey Protein Powder - 1kg (Pineapple & Coconut)

    SiS Whey Protein Powder - 1kg (Pineapple & Coconut)

    100304
    3

    £25.00
  • SiS WHEY20 78ml 12 Pack - Strawberry

    SiS WHEY20 - 12 Pack (Chocolate Orange)

    200702
    4

    £27.49
  • SiS WHEY20 78ml 12 Pack - Strawberry

    SiS WHEY20 - 12 Pack (Caramel)

    200701
    5

    £27.49
  • SiS BCAA Perform - 255g (Summer Fruits)

    SiS BCAA Perform - 255g (Summer Fruits)

    100306
    6

    £18.00
  • SiS BCAA Perform - 255g (Pineapple)

    SiS BCAA Perform - 255g (Pineapple)

    100305
    7

    £18.00
  • SiS L-Glutamine - 400g (Unflavoured)

    SiS L-Glutamine - 400g (Unflavoured)

    100309
    8

    £12.00
  • SiS Creatine - 400g (Unflavoured)

    SiS Creatine - 400g (Unflavoured)

    100308
    9

    £10.00
  • SiS Creatine - 400g (Orange)

    SiS Creatine - 400g (Orange)

    100307
    10

    £10.00
  • SiS Beta Alanine - 150 Tablets

    SiS Beta Alanine - 150 Tablets

    100600
    11

    £19.99
  • SiS Overnight Protein Powder - 1kg (Cookies & Cream)

    SiS Overnight Protein Powder - 1kg (Cookies & Cream)

    100303
    12

    £48.00
  • SiS Overnight Protein Powder - 1kg (Chocolate)

    SiS Overnight Protein Powder - 1kg (Chocolate)

    016112
    13

    £48.00
  • SiS WHEY20 78ml 8 Pack Bundle - (Choice of flavour)

    SiS WHEY20 78ml 8 Pack Bundle - (Choice of flavour)

    sis-bundle-26t
    14

    Regular Price: £16.00

    Special Price £10.00

  • SiS Protein Bar 55g 20 Pack Mint Chocolate

    SiS Protein Bar - 20 Pack (Mint Chocolate)

    009497
    15

    Regular Price: £40.00

    Special Price £34.99

  • SiS Protein Bar 55g 20 Pack Chocolate & Peanut

    SiS Protein Bar - 20 Pack (Chocolate & Peanut)

    009169
    16

    Regular Price: £40.00

    Special Price £34.99

  • SiS Overnight Protein Powder - 1kg (Vanilla)

    SiS Overnight Protein Powder - 1kg (Vanilla)

    016716
    17

    £48.00
  • Protein Bar Bundle

    Protein Bar Bundle

    protein-bar-bundle
    18

    £12.00
  • SiS WHEY20 78ml 12 Pack - Strawberry

    SiS WHEY20 - 12 Pack (Strawberry)

    100069
    19

    £27.49
  • SiS WHEY20 78ml 12 Pack - Lemon

    SiS WHEY20 12 Pack (Lemon)

    100068
    20

    £27.49
  • SiS Whey Protein 1kg Chocolate

    SiS Whey Protein Powder - 1kg (Chocolate)

    015115
    21

    £25.00
  • SiS Whey Protein 1kg Strawberry

    SiS Whey Protein Powder - 1kg (Strawberry)

    015016
    22

    £25.00
  • SiS Whey Protein 1kg Vanilla

    SiS Whey Protein Powder - 1kg (Vanilla)

    015719
    23

    £25.00

    Out of stock

  • SiS Advanced Isolate + Powder - 1kg (Strawberry)

    SiS Advanced Isolate + Powder - 1kg (Strawberry)

    100040
    24

    £45.00
  • SiS Advanced Isolate + Powder - 1kg (Mint Chocolate)

    SiS Advanced Isolate + Powder - 1kg (Mint Chocolate)

    100010
    25

    £45.00

Grid List

25 Item(s)