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SiS Discount Codes

SiS Discount Codes & Vouchers

Save 34% in June 2024

SiS stands for Science in Sport, and that's what you get when you shop there. SiS offers a range of sports energy gels, hydration aids, supplements, vitamins and more. Each of these products has been subject to rigorous testing and is scientifically approved. You can benefit from savings on your next order when you use your SiS discount code.

Tested on 25/05/2024

Tested on 26/05/2024

Valid until tomorrow

No expiry date

Valid until 31/12/2024

Valid until 31/12/2024

Valid until 31/12/2024

Valid until 31/12/2024

Valid until 31/12/2024

Valid until 03/06/2024

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Give These Just-Expired SiS Voucher Codes & Deals a Go

Feel free to try one of these SiS discount codes that may still work.

Valid until 14/04/2020

Valid until 26/07/2016

Valid until 26/02/2024

Valid until 07/02/2024

Valid until 07/02/2024

Valid until 06/02/2024

Valid until 04/02/2024

Valid until 02/02/2024

Valid until 02/02/2024

Valid until 02/02/2024

Valid until 02/02/2024

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You may also like these vouchers

Just Tested

Valid until 01/01/2025

Expires in 2 days

Valid today only

Explore All Valid SiS Deals & Sales for June 2024

Discount

SiS Voucher Details

Expires

34%

SiS Voucher: 34% off Your Online Purchase

No expiry date

15%

Receive 15% off Everything at SiS

No expiry date

10%

10% off Everything with this Discount Code

30 May 2024

10%

Editor Pick: 10% off Your Next Order

No expiry date

10%

Shop 10% off with Student Beans with Voucher

31 December 2024

10%

Editor Pick: 10% off with Newsletter Sign-Up

31 December 2024

£10

Receive £10 off with Friend Referrals with this Discount Code

31 December 2024

15%

Up to 15% off with Reward Membership Sign-up when you Redeem this Offer

31 December 2024

Deal

Free Delivery on Orders at SiS

31 December 2024

£10

SiS Deal: Isotonic Energy Gel starting from only £10

03 June 2024

Useful tips and information

SiS Voucher Codes

Does SiS offer a student discount?

Yes! SiS currently offers a student discount worth 20%. Claiming the exclusive student offer is quite simple. Create an account on the student platform UNiDAYS and verify that you are currently enrolled as a student. Upon successful verification, the promo code for students will be automatically sent to your inbox.

Is there a birthday discount?

On your birthday, you can currently receive up to 20% off the whole product range at SiS. Simply make sure that you've entered your birthdate correctly when registering an account. The SiS birthday code may be used for a purchase of your choice.

Using your discount code

Claiming and applying one of our SiS promo codes is quite simple. Browse our list of available SiS vouchers and copy the code that saves you the most to your clipboard. Pick the products you would like to purchase and head to the checkout. There, locate the designated promotional tab and paste your code into the input box. Activate your code by clicking on "Apply" and watch your bill drop immediately.

What do I do if I fail to redeem my SiS voucher code?

The price reduction of our SiS vouchers should be automatically discounted from the total. If that is not the case, consider following the steps below:

  • Check to ensure that you are using a SiS promo code that is meant for your customer group. For instance, if you have already placed an order you may not use first-order discounts.

  • Verify that you are applying a valid SiS code. If your code has already expired, select an alternative voucher code for your purchase.

  • Transfer the SiS discount code correctly, keeping in mind that our vouchers are case sensitive.

  • Some SiS voucher codes are tied to a minimum order requirement. Make sure to exceed the respective amount to receive the discount.

Are there any SiS offers for existing customers?

SiS offers various bundle deals as well as category discounts. With these, you easily save up to 40% on various sports products. Look around our Voucherbox website for attractive SiS discount codes and enter the code of your choice at the checkout to enjoy the price reduction.

Can I benefit from a SiS discount for new customers?

Yes! New customers currently have the opportunity to receive a gift for their first purchase. Simply place an order above £60 to get a free premium shaker. SiS regularly releases similar gift events. Keep an eye on our Voucherbox website to stay updated about current gift events.