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Since 1992, Science in Sport has fuelled Olympians, World Record Holders and World Champions from Cyclists to Swimmers and Heptathletes to Runners. SiS is now the world’s leading performance nutrition brand, combining world-class knowledge and scientific formulations to provide optimal performance solutions across the nutritional need states of energy, hydration and recovery.
Currently the official sports nutrition partner to Team INEOS, the German Cycling Federation and Legion of LA, Science in Sport is also the partner of high performing institutions such as USA Triathlon and the English Institute of Sport as well as fuelling over 150 professional football clubs and being Performance Research Partner to the English Football Association.
SiS prides itself on its commitment to testing and certification, that’s why its products are trusted by professional teams and athletes. SiS ensures that its products are safe for athletes to use and have them externally validated by LGC, the world-class sports doping laboratory behind Informed Sport.
When you commit so much time, energy and determination to being the best you can be, you want a sports nutrition partner that truly understands endurance sport – one that you can trust to provide the best products and expert guidance. SiS spends as much time understanding how best to fuel you as you do training and preparing so you can be sure their products are up to the task of helping you reach your goals.
FREE DELIVERY on all orders over £75
Our delivery options may vary. View what's currently available at checkout.
CLICK & COLLECT: Free
Have your item ready to collect in-store for free. Most items can be collected from 2pm the following day. To avoid disappointment, please wait until you have heard from your selected store prior to travelling.
STANDARD DELIVERY: £5.95
Delivered in 2-3 working days. Free for orders over £75. Please note, sale items or at busy periods, orders may take an additional 48 hours to be delivered.
NEXT BUSINESS DAY: £9.95
Order before 1pm Monday to Thursday. Orders placed before 1pm Friday will be delivered Monday.
RETURNS: We hope you’re happy with your order. If you’re not perfectly satisfied, you may return your item(s) within 30 days. Item(s) must be returned unused and in its original condition and packaging. Please read our full returns policy here.
Note exclusions apply. View our full DELIVERY and RETURNS policy.
