SiS Premier


FREE UK Delivery over £40 Deliveries and Returns
Product Overview

How does it work?

Once you've subscribed to Premier (details on how to do that below) you'll notice a new delivery option appear in the checkout for your next orders, called "Free Premier Next Day Delivery". All you have to do is select that option when you checkout - it will even be auto-selected in most cases. You'll then be sent your order as per the standard delivery timeframes for all of our Next Day Deliveries, shown below as a reminder.

Weekdays:Orders placed before 7pm will be delivered the next day - including on Saturdays (For example if you order at 6.45pm on a Tuesday, you'll receive your delivery on Wednesday). 
Orders after 7pm will be delivered the following day - Including on Sundays (For example if you order at 9pm on Friday, you'll receive your delivery on Sunday).

Weekends: Orders placed before 1.30pm will be delivered the next day - including Sundays (For example if you order at 12.15pm on a Saturday, you'll receive your delivery on Sunday).
Orders after 1.30pm will be delivered the following day (For example if you order at 3pm on Sunday, you'll receive your delivery on Tuesday).

Sounds great, how do I subscribe?

It couldn't be simpler - select the 'Add to Basket' button above and check out as normal. You will be prompted to create an account during checkout and free next day delivery will be automatically selected. 

Now that i've subscribed - How do I know how long I have left?

Science in Sport Premier is valid for 12 months. Simply log into your account and you'll find a progress bar under the heading "SiS Premier" on your Account Dashboard. If you can't find it or are still unclear, our friendly customer service team are always on hand to help.

Are there any restrictions?

At the moment we can only offer Science in Sport Premier within the UK. Most of the UK is covered, but unfortunately the following postcodes are excluded: AB31-56, BF (all), BT (all), CA, DD, DG, EH, FK17-21, G83, GY (all), HS (all), HU 11-12, IM (all), IV (all), JE (All), KA27-28, KW (all), PA20-80, PH15-PH50, TD, TR21-25, ZE (all). Additionally, we can only guarantee next day delivery to private addresses, not business addresses. In these cases, delivery may take an additional day.

Our Full Terms and Conditions for Science in Sport Premier are detailed below.

Terms and Conditions

  • •When you join Science in Sport Premier your membership is valid for a 12 month period. You need a registered customer account on to subscribe.
  • •You can cancel your membership by cancelling your order by contacting our Customer Service Team. A full refund of your membership fee will be given if you have not made any eligible purchases using the SiS Premier service. A partial refund (the difference between the cost of subscription paid and the regular price of Next Day Delivery at the time of ordering) will be made within 1 month of purchasing the service where no more than 1 eligible purchase has been made using the SiS Premier Service
  • •Once 2 or more eligible purchases have been made your membership cannot be cancelled.
  • •Science in Sport Premier is only available for delivery to residential (not business/education) UK addresses (excluding these postcodes: AB31-56, BF (all), BT (all), CA, DD, DG, EH, FK17-21, G83, GY (all), HS (all), HU 11-12, IM (all), IV (all), JE (All), KA27-28, KW (all), PA20-80, PH15-PH50, TD, TR21-25, ZE (all)) and entitles you to free Next-Day Delivery (delivery is on the next day (Monday-Sunday) if ordered before 19:00 (Monday-Friday) and before 13:30 (Saturday-Sunday)). Delivery is excluded on Public Holidays.
  • •There is no limit on how many times you can order during your subscription period.
  • •Free next day delivery is not valid in conjunction with free product promotions. Science In Sport reserve the right to cancel orders of this nature without notification.
  • •Early access to new products will be granted to active SiS Premier subscribers who are also subscribed to the email newsletter.
  • •It is your responsibility to ensure you use SiS Premier in accordance with the terms and conditions. Any breach will result in the termination of your membership and no refund will be given.
  • •Science In Sport reserves the right to accept or refuse membership and to change any terms and conditions at our discretion.
  • •You will be informed of any significant changes to these terms and conditions. All other Science In Sport terms and conditions apply.
  • •SiS Premier is for personal use only and is not available for customers who purchase goods for business, re-sale or wholesale purposes.
Reviews (20 Reviews)
Showing 20 of 20 reviews

Great product. Thoroughly recommend it.



well, anything to help with the deliveries is appreciated.

Syed Masood


Always a good deal, with 50% off it was a ridiculous bargain.

Tim Parker


Got this half price and delivery was next day 👍

Dean O


Great offer! - thank you

Paul Baker


Regular user so worthwhile



As a regular purchaser saves money on p&p thru the year

Steve Tout


SiS Premier is well worth the money for free quick delivery on your orders, even better when it was free with a code they sent me.

Wendy Foster


Free next day delivery is awesome.



Next day delivery for 12 months for £10. Fantastic.



great taste



Great service, well worth it. Thank you.

Chris Hossell


Renewed again as saves me money over the year .



Great price for the year

David Parker


Haven’t received premium delivery but paid for it, the lady 3 orders were later than premium 😢

Pete Roper


Had been thinking of for a while, then got it free on offer Can’t fault it so far , well recommend, bang on time



Well worth the cost for next day delivery



Got this free with an offer and think it's a great idea! When I see a deal or there's something I need, I can buy it there and then without having to worry about minimum spend or delivery costs/



Get your Sis fuel next day for free - no brainer

c scott


Excellent as usual

Glen Phillips