SiS (Science in Sport) discount codes

SiS (Science in Sport) Discount Codes

18 hot deals

All SiS (Science in Sport) Voucher & Promo Codes for March 2019

-£5Take £5 off Everything @ SiS

Minimum spend:£40

Conditions:Some exclusions apply. 

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-£5£5 off Your Order at SiS with this Promo Code

Minimum spend:£30

Conditions:Some exclusions apply.

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-10%Get Extra 10% off Bundles at SiS

Conditions:Valid only on items featured on the promotional page.

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% off
% offFree Delivery at SiS
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% off
% offSave at SiS with Free Sample

Minimum spend:£10

Conditions:Valid only while supplies last. Some exclusions apply.

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50% off
50% off 50% Off Everything at SiS with code FIFTY
Just used myself on a REGO powder bundle and shaker: Was £82, down to £41.

Just got the email about this offer this morning. Excludes special offers and beta fuel. Ends at midnight. Also up to 3 free gifts: ORDERS OVER £25 = FREE INTRO SUPPLEMENTS PACK ORDERS OVER £50 = FREE GO ELECTROLYTE 500G ORDERS OVER £75 = FREE ENDURANCE PACK


I swear by the energy gels. I have ran two half marathons (get me), one using energy gels and one without. The one where I had an energy gel every 5km was substantially easier and it definitely wasn’t just psychological.


People are sceptical when I tell them I use Go Hydro/Go Energy/Rego as they don’t believe it is actually helping me... but personally I actually notice a difference! And with 50% off I’ll be stocking up. Heat Added.


Doesn't work on everything

More Info
More Info Any 6 pack of Go isotonic energy gels FREE - premier delivery or £3.99 @ SiS
Add any 6 pack of Go isotonic gels to your basket, can be any flavour of your choice. In the basket simply enter the promo code to get your 100% off discount. If you have a premier… Read more

Thanks too OP, didn't come through on my keyword feed for some reason but still working :D


Just ordered, thanks OP. Bit of an extra encouragement to get back on the training (y)


Works for me. Thanks OP


Thanks op. Already had Premier delivery from another offer, so free for me. Plenty of stock for my forthcoming rides.


Great, thanks for posting. Free for me... finally used my premier account for free postage :D

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79% off
79% off Save 79% with SiS.
Save 79% and get £45.80 of product + unlimited next day delivery for a year for only £9.99! > Follow the link and add the bundle to basket > Add SiS Premier to basket (£9.99… Read more

Me being silly. Added 2 of the gel packs to the basket


Struggling to get this to work, I have tried on a phone & laptop but it's showing as £48.79 the code doesn't seem to be doing anything. Am I being stupid or is the code finished ?


Brilliant, thank you XD


Plus you get £1.45 of reward points off your next purchase.


Awesome :) (y) 🏻

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£5 off
£5 off £5 off at the science in sport website

Yes just the postage to pay. For what it's worth its yodel delivery service which was next day


no minimum spend, but postage is £3.99


Morning Jonny501123, thanks for posting, do you know if there are any terms & conditions with using the code & what the expiry date is? Thanks again


is there any min spend?

40% off
40% off 40% off all orders using voucher code @ Science In Sport

Although it *shouldnt* work with a little checkout jiggling you can get both the 40% and other offers to work together, such as 2 for 1. Just used: 40% off SiS - £12.12 241 - 500g Electrolyte/Energy - £9.89 (BOGOF) Free Shipping Over £25.00 - £0.00


Thank you, just got stuff I want even cheaper :p. TopCashback is currently offering 18.9%, but only if you lucky, as they may invalidate cashback due to use of above code :|


Good find - thanks OP. This stuff really works and tastes great.


This is a great deal. It also seemed to take another £2 off at checkout for something? I got 10 x packs of the £4.99 variety pack 70 quality gels for £29.90 = just over 40p each Also, 8% quidco is available. Thanks OP :)


i bought 9 boxes.. of the 4.99£ SiS GO Isotonic Energy Gel Single Apple SiS GO Isotonic Energy Gel Single Lemon & Lime SiS GO Isotonic Energy Gel Single Orange SiS GO Isotonic Energy Gel Single Blackcurrant SiS GO Isotonic Energy Gel Single Tropical SiS GO Isotonic Energy Gel Single Pineapple SiS GO Isotonic Energy Gel Single Pink Grapefruit so thats 63 gels intotal for just shy off 27£.. Bargin

Top Merchants

Newest SiS (Science in Sport) Discount Codes:

DiscountDiscount DetailsExpires
£5Take £5 off Everything @ SiS25/05/2019
£5£5 off Your Order at SiS with this Promo Code25/05/2019
10%Get Extra 10% off Bundles at SiS25/05/2019
Free DeliveryFree Delivery at SiS25/05/2019
Free SampleSave at SiS with Free Sample25/05/2019