I've been using SiS for a while now and can't fault the products but on this occasion there were delays with the order being received despite paying for next day delivery. After placing the orde... See more
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Edit: turns out it was a technical issue. Getting all sorted out did require some patience and exchanging some emails. However I am very glad with the professional attitude of Science in Sport.... See more
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Always loved SiS products, but today I want to highlight their excellent customer service. It's only when things go wrong that you can truly judge how good a company and its people are. I made a mista... See more
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Experience is as expected. Choose, pay, receive. No issue's. Strawberry and lime gel is absolutely peng and surprisingly, so is the lime chew. Thought it would be like sticking a urinal cake in my mou... See more
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Company details
About Science in Sport (SiS)
Written by the company
Science in Sport are an endurance nutrition brand focusing on the key areas of hydration, energy and recovery.
Providing a range of superb premium sports nutrition such as energy gels, energy bars, hydration tabs, protein shake powders and much more, SiS work with pioneering scientists and elite athletes such Sir Chris Hoy & Helen Jenkins. Therefore, it’s clear to see why SiS have been behind 40 Olympic Gold Medals since 1996.
SiS GO Energy Range – Carbohydrate loaded energy gels, energy bars & energy drinks for all endurance sports
SiS GO Electrolyte Range – Balance of carbohydrate energy & effective hydration
SiS GO Hydro Range – When you need hydration with virtually no calories
SiS REGO Rapid Recovery Range – To help recover, rebuild and support the body’s adaptation to training
SiS REGO Protein Range – A blend of rapidly absorbing proteins to provide a protein boost and support muscle rebuild
Providing a range of superb premium sports nutrition such as energy gels, energy bars, hydration tabs, protein shake powders and much more, SiS work with pioneering scientists and elite athletes such Sir Chris Hoy & Helen Jenkins. Therefore, it’s clear to see why SiS have been behind 40 Olympic Gold Medals since 1996.
SiS GO Energy Range – Carbohydrate loaded energy gels, energy bars & energy drinks for all endurance sports
SiS GO Electrolyte Range – Balance of carbohydrate energy & effective hydration
SiS GO Hydro Range – When you need hydration with virtually no calories
SiS REGO Rapid Recovery Range – To help recover, rebuild and support the body’s adaptation to training
SiS REGO Protein Range – A blend of rapidly absorbing proteins to provide a protein boost and support muscle rebuild
Science In Sport - Leaders in Endurance Sports Nutrition Products
Written by the company
- TRUSTED BY ELITE OLYMPIC ATHLETES & WORLD CHAMPIONS
- Being a leading endurance nutrition manufacturer, we are proud to be part of HFL’s list of Informed-Sport approved brands and products, having been the first to pass through the sport laboratory’s evolved banned substance testing programme. It’s no wonder our ambassador is Sir Chris Hoy.
- SiS CUSTOMER SERVICE
- We value each and every one of our customers, whether you buy from us directly or from any of our trusted partners around the world. Every customer receives personal support and guidance from our expert team of professional customer service advisors and qualified sports nutritionists.
- SiS REWARDS LOYALTY PROGRAMME
- The SiS Rewards programme has been designed to reward our ever-growing loyal customer base with fantastic exclusive offers and a chance to earn money off every single order placed at scienceinsport.com. Joining the SiS Rewards scheme is FREE and discounts can be earned today.
- EXCLUSIVE BUNDLES & PRODUCTS
- Scienceinsport.com gives customers the opportunity to try a range of different products and flavours in various money-saving bundles not available anywhere else. Addressing key areas such as energy products, hydration tabs and protein products, these online-exclusive bundles contain individual sachets and packets that are great for gifts as well as convenient to take out and about.
SCIENCE IN SPORT GUARANTEE
If you’re not fully satisfied, please get in touch
We pride ourselves on providing an exceptional experience for all our customers. From ordering their favourite sports nutrition on our website to feeling the positive benefits whilst competing in races, we strive to ensure every customer gets the full SiS experience. If you are unhappy with your order, please do not hesitate to get in touch with our friendly customer service team who will be happy to help you.
Contact info
United States
- support@scienceinsport.com
- www.scienceinsport.com
4.2
Great
66k reviews
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Fast delivery and the product worked…
Fast delivery and the product worked well for me in my training and half marathon.
27 September 2026
Reply from Science in Sport (SiS)
Hi Robert,
We are so thrilled to hear that your order arrived quickly and supported you effectively throughout your training and half marathon. Congratulations on your achievement!
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi,
Thanks for your feedback!
Kind regards
Team SiS
SIS make some great products
SIS make some great products, and particularly like the GO powder, tastes good and really adds a boost while exercising hard
27 September 2026
Reply from Science in Sport (SiS)
Hi Paul,
It is wonderful to hear that you enjoy the flavour of our energy drink mix and that it gives you an extra lift during intense workouts. Thank you for taking the time to share your positive experience with us.
Kind regards
Team SiS
The order should have included a pack…
The order should have included a pack of energy gels as a promotional gift, whilst our order was complete in relation to our paid purchase, the missing items was disappointing
27 September 2026
Reply from Science in Sport (SiS)
Hello Mark,
Thank you for sharing your feedback. We regret that the expected promotional gift was missing from your delivery, as we did not hear from you in regards to this missing item, we've been unable to resolve this.
A member of our team will be in touch shortly.
Kind regards
Team SiS
My order was delivered to the wrong…
My order was delivered to the wrong address. The company soon put things right by making up a new order and delivered speedily.
27 September 2026
Reply from Science in Sport (SiS)
Hi Valerie,
Thank you for sharing your feedback. We regret that your initial package went to the wrong location, but we are glad our team quickly prepared and dispatched a replacement to you.
Kind regards
Team SiS
Excellent products ,fast delivery
26 September 2026
Reply from Science in Sport (SiS)
Hi George,
We truly appreciate you taking the time to share your feedback. It is wonderful to hear that you are so satisfied with the quality of our items and the speed of our shipping.
Kind regards
Team SiS
I have been using SIS products for a…
I have been using SIS products for a number of years now and can definitely say they are top quality products.
23 March 2026
Reply from Science in Sport (SiS)
Hi Colin,
Thank you for being a loyal customer over the years. We are thrilled to hear that you consistently find our items to be of the highest quality. Your continued support and positive feedback mean a lot to us.
Kind regards
Team SiS
Customer support so very helpful as my…
Customer support so very helpful as my parcel had gone missing
26 September 2026
Reply from Science in Sport (SiS)
Hi Mark,
We are glad you had a positive experience and that we could help locate your missing package. Thank you for your review.
Kind regards
Team SiS
I use science insport recovery drink…
I use science insport recovery drink after a hard bike ride, I find it excellent for recovering so I can exercise the following day. I like vanilla flavour, not tried any other flavour.
23 September 2026
Reply from Science in Sport (SiS)
Hi Alison,
It is great to hear that our post-workout drink helps you recover effectively after a tough cycling session. We appreciate your feedback on the vanilla flavour, and we hope you get to enjoy some of our other options in the future as well.
Kind regards
Team SiS
Usual great quality and service
23 September 2026
Reply from Science in Sport (SiS)
Hi Ian,
Thank you so much for your wonderful feedback. We are thrilled to hear that we consistently meet your expectations with high standards and exceptional support. Your loyalty and positive words mean a lot to our team.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi there,
We appreciate your feedback and are so happy to hear that you're enjoying the products.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi Kevin,
We are so happy to hear that you had such a great experience with our items and that your order arrived so quickly. Thank you very much for taking the time to share your positive feedback with us!
Kind regards
Team SiS
My first order had a few gels that…
My first order had a few gels that popped open in the box (assuming the courier was a bit rough). SIS replaced it and shipped it within 3 days. I’ve used the product for the last 2 years and will carry on using it going forward for sure. 2 marathon PBs 😎
22 September 2026
Reply from Science in Sport (SiS)
Hi Michael,
We are glad you enjoyed your experience with our team and products. We appreciate your patience regarding the initial delivery issue and are pleased we could resolve the situation swiftly for you.
Thank you for sharing your positive feedback and for your continued support over the past two years.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi Kacper,
We appreciate your feedback and are so happy to hear that everything was ok.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi Jay,
We appreciate your fantastic feedback and are so happy to hear that you consistently enjoy swift shipping alongside high-quality items.
Kind regards
Team SiS
Great experience.
21 September 2026
Reply from Science in Sport (SiS)
Hi Daisy,
We appreciate your feedback and are glad you had a great experience.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi there,
We're glad you enjoyed your experience! Thank you for your positive feedback regarding our prompt delivery and accurate order fulfilment.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi Joel,
We are glad you enjoyed our products and appreciate your feedback regarding the shipping speed. We are working to improve our delivery times.
Kind regards
Team SiS
Reply from Science in Sport (SiS)
Hi Jacob,
Thank you for sharing your feedback. We are delighted to hear that your order arrived promptly and that you are happy with the high standard of your items.
Kind regards
Team SiS
They replaced a product that had…
They replaced a product that had spilled out of its container very quickly and gave me an extra one.
20 September 2026
Reply from Science in Sport (SiS)
Hi there,
We are so glad we could quickly resolve the issue with your damaged item and send out a replacement for you. Thank you for sharing your positive feedback with us!
Kind regards
Team SiS
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