SiS Promo Codes

See how we find our codes

If you’re curious about how we find our Glamour voucher codes, look no further. You can see how our team finds you savings in our process guide.

A little bit about SiS:

The makers of performance-driven products that have been designed to meet your nutritional needs and support your training goals, SiS is a global brand that's become our go-to for sports nutrition. Whether you're after pre-workout supplements, energy gels for a mid-run boost, or recovery and protein powders for some post-workout fuel, SiS has all your bases covered.

Our favourite saving hacks

• Discount codes: Find great deals on gels, supplements and protein powders. Enjoy 40% off with SiS promo codes when buying Turbo+ products.

• Coupons: Use SiS coupon codes when at the checkout to enjoy savings of up to 30% on supplements. You can also enjoy savings of 20% when buying energy bakes.

• Free delivery: Save even more when you take advantage of free standard delivery on orders over £35.

SiS seasonal sale events to add to your calendar

SiS bank holiday sale: Make a saving of up to 30% on supplements.

SiS Hydration sale: Save a third on hydration tablets and supplements to give your fitness goals an essential boost during the summer. 

Black Friday sale: Make significant savings during the last week of November, with Black Friday savings of up to 50%.

The best SiS discounts available and how to use them

Redeeming your discount codes

1. Go through our list of SiS codes on hydration products, supplements, and energy bars. Find the promo code that interests you and copy it to the clipboard

2. Visit the SiS website and go through all the products on sale. Select your desired supplements or any other products and add them to the shopping cart.

3. Click on checkout and on the space provided for a promotion code, paste the code you had copied.

4. Click apply and your totals will be recalculated.

Questions to ask if your SiS ode isn’t working.

• Is the SiS discount code used still valid and not out of date?

• How are SiS voucher codes used?

• Is the SiS discount code selected applicable to only a particular bundle of goods?

• Is the SiS voucher code entered correctly without any errors?

• What kind of promo codes are available on the SiS shop?

• Do all of the items on my shopping cart qualify for the SiS discount?

How to find year-round discounts

Throughout the year, we offer SiS discount codes as well as vouchers that help you save as you purchase supplements and energy bakes. Without relying on seasonal sales, there is a permanent sales area. There is an SiS clearance offer where you get a 70% off on protein powders and also 50% off on protein bars.

Discounts for new customers

SiS does not have discounts for new customers. However, new customers are advised to subscribe to the SiS newsletter when creating an account. This way, you’ll be the first to know about new discounts and deals.

Discounts for students

SiS offers discounts to students shopping for our sports items. Exclusive discounts of up to 40% are given on the purchase of nutritional products with us. However, for this discount to be activated, all students need to register through UNiDAYS.

Subscribing to a newsletter

When you subscribe to the newsletter, you’ll receive weekly updates from SiS. This way, you’ll know all about the latest product deals and any new promo codes. What’s more, you’ll find essential information about improving your health and fitness plans. You've got the running vest, you've bagged a new pair of On Running kicks, now it's time to put the work in with the help of SiS. You're welcome.

Additional helpful information

Returns

Goods ordered from SiS can be returned if you are not satisfied with them. It's recommended to return them directly to SiS. Items will only be accepted back if they are still in their original packaging and have not been tampered with. Goods with broken seals are not accepted back. Once the items returned are accepted, a refund will be made and can take several days. You're usual returns routine.

SiS next day delivery

SiS customers can enjoy next day delivery. In order to access this service, you have to sign-up to SiS Premier and pay £3.99. This offer runs throughout the year on all your purchases. Make sure to save more using this affordable offer. When your items are once dispatched, we send an email to make sure you track your order.

Price match policy

1. Price match is applicable where you find our SiS products cheaper elsewhere.

2. Ask for the price match policy before you make purchases.

3. The price match policy is also applicable to live and visible discounts.

4. A price match policy is also applicable on any online price with a voucher discount on the condition that it is clearly available to all customers.