During Exercise

It’s vital to choose the correct sports nutrition to power you through your workout. Here at Science in Sport, our range of workout supplements has been designed to promote the desired training adaptations and drive your body composition goals. From energy gels to hydration products to replace the fluids and electrolytes lost during exercise, our fitness supplements have been expertly formulated to deliver the carbohydrates you need to fuel your workout. To take your training to the next level and reach new goals, shop SiS workout supplements today.

Accelerate your performance

From energy gels to bars and protein powders, our wide range of workout supplements will help you take your workout to the next level. Expertly engineered to deliver a dose of energy when you need it the most, our energy bars, gels and hydro tablets are convenient to consume when you’re on the move, perfect for a mid-workout boost.

Achieve your fitness goals

When planning your workout supplement intake, consider the energy your body needs to power through a long distance session, the protein it needs to prepare, and the fuel required to push harder to achieve your fitness goals. At Science in Sport, we’ve engineered our fitness supplements to drive your body’s processes and deliver energy during exercise.

Stay hydrated

During any form of exercise, it’s important to stay hydrated and replace the fluids and electrolytes lost through sweat. From hydro tablets to isotonic energy gels and electrolyte powder , our selection of fitness supplements also includes effective hydration products to support your best performance. Simply dissolve in your water bottle for a high-electrolyte drink, without hidden calories.

Shop SiS workout supplements

From sports supplements to vitamin tablets , our fitness supplements have been carefully curated to help you achieve your health and fitness goals. For a boost of energy when you need it the most, discover the benefits of SiS workout supplements today. Looking to build muscle and increase your protein intake? Our wide range of sports nutrition products also includes protein powders and protein bars to help support muscle growth.
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21 Products

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  1. GO Isotonic Energy Gel Bundle (2 x 6 pack)
    GO Isotonic Energy Gel Bundle (2 x 6 pack)
    £12.00 Was £20.00
    Save 40%
  2. go-isotonic-energy-gels-30-pack
    GO Isotonic Energy Gel
    8 Flavours
    From £5.25
    Save 40% - 61%
    From £10.50
  3. GO Energy Bar Mini - 30 Pack
    GO Energy Bar Mini - 30 Pack
    2 Flavours
    From £23.40
    Save 40%
    From £39.00
  4. GO Energy + Caffeine Gels
    GO Energy + Caffeine Gels
    3 Flavours
    From £6.60
    Save 40% - 50%
    From £13.20
  5. Recovery Bundle
    Recovery Bundle
    £72.00 Was £120.00
    Save 40%
  6. Protein Bar - 20 Pack
    Protein Bar - 20 Pack
    1 Flavours
    From £24.00
    Save 40%
    From £40.00
  7. Speciality Mixed Gel Bundle - 30 Pack (Multi Flavour)
    Speciality Mixed Gel Bundle - 30 Pack (Multi Flavour)
    £36.00 Was £60.00
    Save 40%
  8. SiS GO Hydro 20 Tablets Berry
    GO Hydro (Berry)
    Save 40%
    Special Price £4.80 Was £8.00
  9. SiS GO Isotonic Gel 60ml 30 Pack Blackcurrant
    GO Isotonic Energy Gel Blackcurrant 30 Pack
    Save 50%
    Special Price £18.50 Was £36.99
  10. SiS GO Isotonic Gel 60ml 6 Pack Orange
    GO Isotonic Energy Gel Orange 6 Pack
    Save 40%
    Special Price £6.30 Was £10.50
  11. SiS GO Hydro Pineapple & Mango - 8 Pack
    SiS GO Hydro Pineapple & Mango - 8 Pack
    Save 40%
    Special Price £36.00 Was £60.00
  12. 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
  13. SiS GO Energy Bar Mini 40g 30 Pack Banana Fudge
    GO Energy Bar Mini Banana Fudge - 30 Pack
    Save 40%
    Special Price £23.40 Was £39.00
  14. GO Isotonic Energy Gel Orange 15 Pack
    GO Isotonic Energy Gel Orange 15 Pack
    Save 53%
    Special Price £12.00 Was £25.50
  15. 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%
  16. SiS GO Isotonic Gel 60ml 30 Pack Pineapple
    GO Isotonic Energy Gel Pineapple 30 Pack
    Save 40%
    Special Price £22.19 Was £36.99