Optimum Nutrition Discount Codes for October 2025

Code

Save £20 on orders over £110 when using this Optimum Nutrition discount code

Only 3 Days Left

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 23 Oct 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Get a free protein bar bundle when you spend at least £70 by entering this Optimum Nutrition discount code

Offer Expires Today

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 20 Oct 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Enjoy free Creatine on selected orders over £70 when using this Optimum Nutrition promo code

Only 3 Days Left

Added by Rachael S

Terms and Conditions

Code

Enjoy a free amino energy on orders over £70 by entering this Optimum Nutrition promo code

Only 2 Days Left

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 22 Oct 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Get a free creatine on orders over £80 by using this Optimum Nutrition voucher code

Only 2 Days Left

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 22 Oct 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Get a free limited edition shaker on orders over £70 by entering this Optimum Nutrition voucher code

Only 3 Days Left

Terms and Conditions

Discount

Save 15% on your first order when you join the newsletter at Optimum Nutrition

Ends: 30 Apr, 2026

Added by Rachael S

Terms and Conditions

Exclusions may apply.

Discount

Get £10 off for both you and a friend with the referral scheme at Optimum Nutrition

Ends: 30 Apr, 2026

Terms and Conditions

Exclusions may apply.

Discount

Enjoy free delivery on all orders over £50 at Optimum Nutrition

Ends: 31 Oct, 2026

Terms and Conditions

Exclusions may apply.

Discount

Get next day delivery on orders made before 2pm at Optimum Nutrition

Ends: 31 Mar, 2026

Terms and Conditions

Exclusions may apply.

Discount

Get a free gift on orders when you spend at least £55 at Optimum Nutrition

Ends: 10 Nov, 2025

Terms and Conditions

Exclusions may apply

Previous Optimum Nutrition Codes

Code

Get 20% off selected orders using this Optimum Nutrition discount code

Offer Expired

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 3 Sep 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Save 20% on your order by entering this Optimum Nutrition discount code

Offer Expired

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 25 Sep 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Get 20% off selected orders when using this Optimum Nutrition discount code

Offer Expired

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 25 Sep 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Get 20% off orders when using this Optimum Nutrition voucher code

Offer Expired

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 25 Sep 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Get 20% off selected orders when using this Optimum Nutrition promo code

Offer Expired

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 8 Oct 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Code

Save 20% on selected orders when using this Optimum Nutrition voucher code

Offer Expired

Terms and Conditions

This promotion is: (i) only valid on the retailer's website; (ii) subject to availability; (iii) must be used before the expiration date; (iv) cannot be used in conjunction with other offers, promotions or discounts unless stated otherwise; (v) may not apply to taxes or any other fees; and (vi) not transferable or redeemable for cash or credit. Further important things to note about this promotion: The end date of this offer is 16 Oct 2025 23:59 Some products may be excluded. There may be exclusions based on location. The price and discount displayed were correct at the time of publication. The retailer can change, pause or end this promotion at any time without notice. By using this promotion, you acknowledge that you have read and understood the above terms and conditions. For further details, please check the retailer's website.

Jump to category:

FAQs
Delivery & Return FAQs
Other FAQs
Our Optimum Nutrition Money-Saving Tips
How to Use Your Optimum Nutrition Discount Code
How do we source discount codes?
What if my discount code doesn't work?
How we make money

By Jack Cunningham

last updated 20 October 2025

in Vouchers

FAQs

Delivery & Return FAQs

Can I get free delivery at Optimum Nutrition?

Yes, shoppers can enjoy free Standard UK delivery on orders over £50.00 at Optimum Nutrition. For orders under this amount, shipping will come with a £3.99 charge.

What other delivery options are available?

Alongside Standard UK delivery, customers can select Express UK delivery for £9.99 should they wish to receive their goods sooner. Orders should arrive within 1-2 working days when selecting this option.

What is the Optimum nutrition returns policy?

You’ll have 14 days to return your products from the date of delivery. Supplements and food products should be returned unopened and clothing items should be returned with their tags still attached. To start the returns process, you’ll need to email their customer service team.

Other FAQs

How do I contact Optimum Nutrition?

The best way to get in touch with the Optimum Nutrition customer service team is by calling them on 0800 0728 451. You can also send an email to customersupport@optimumnutrition.com or complete their online contact form.

Can I refer a friend to Optimum Nutrition?

Yes, you can! By referring a friend to Optimum Nutrition, you’ll get a £10.00 discount to spend on your next shop.

Our Optimum Nutrition Money-Saving Tips

Newsletter deals, checking out the ‘Offers’ section and taking advantage of seasonal sale events are other ways to save at Optimum Nutrition.

Newsletter Deals: Sign up for the Optimum Nutrition newsletter. By doing so, you’ll get 15% off your first order! You’ll also get exclusive promotions, product news and fitness advice sent straight to your email.

Check Out the ‘Offers’ Section: Be sure to check out the ‘Offers’ section of the Optimum Nutrition website. Here, you’ll find all of their best deals and promotions.

Buy in Bulk: Why not buy in bulk? You might find that stocking up on your supplements and sports nutrition can save you money. You’ll find the ‘Bundles’ section under the ‘Offers’ section mentioned above.

Seasonal Sales: Keep your eyes on the Optimum Nutrition website during popular sale periods such as Black Friday, Christmas, New Year, Easter and the summer. You might just bag yourself a bargain!

How to Use Your Optimum Nutrition Discount Code

1. Look through our list of Optimum Nutrition discount codes and choose one that best suits your shopping needs.

2. Click the 'Get code' or 'Get discount' button. Optimum Nutrition website will open automatically in a separate tab.

3. Browse the Optimum Nutrition website and select the products that you’d like to buy. Add them to your basket and proceed to checkout once finished.

4. You’ll then need to paste your Optimum Nutrition promo code into the ‘Promotional code - Enter your code’ section and ensure that it has been successfully applied.

5. Confirm payment and enjoy your savings.

How do we source discount codes?

At MyVoucherCodes, we’re lucky to have a team of hard-working individuals who are dedicated to finding you the best possible discount codes, deals and offers that are currently available. We also work closely with retailers to secure exclusive promotions; providing you with unique savings that you won’t find anywhere else.

We keep in touch with retailers and brands

Based in London, our Commercial team is a key part of everything we do. They know the industry, and they work tirelessly to build relationships with big-name retailers in order to secure exclusive offers and rewards that are then passed on to our customers. They keep their ear to the ground for any upcoming offers and sale events too, meaning we’re always ahead of the game when it comes to updating our website.

Our team scours the web for discounts

They work in tandem with our Deal Experts, who can be found at our Cardiff office. These deal-finding wizards scour the web for all of the best discounts and promotions around, before loading them onto our website for customers to enjoy. They also work closely with affiliate networks that keep us informed of the latest offers for the retailers they represent. Our dedicated retailer pages are updated at least twice a week, meaning you can be confident that the voucher codes you’re seeing are up-to-date and valid.

We share our money-saving knowledge

On our retailer pages, you’ll notice in-depth information about the brand and researched hints and tips on how to save money when shopping online. This is where our Category Editors come in - they know a thing or two when it comes to savvy shopping. From technology, health & beauty and fashion to food & drink, home & garden and travel, they keep all pages up to date with content that is designed to make your shopping experience that little bit easier and to help you save money in the process. For more information on the MyVoucherCodes team and the company as a whole, be sure to check out our About Us page.

What if my discount code doesn't work?

As a collaborative team, we do our best to ensure that incorrect or outdated discount codes and offers aren’t listed on any of our retailer pages. To do this, we test the codes ourselves to make sure that they work and aim to give as much guidance as possible with regard to how they are supposed to be used.

However, sometimes details change or codes expire without us knowing. If you find this to be the case, you can get in touch by emailing info@myvouchercodes.co.uk or by visiting our contact page.

How we make money

Using our discount codes is totally free, although we understand that this may seem too good to be true. Like all businesses, we need to make money, and we do this via commission-based relationships with brands and retailers - we earn a small percentage from the retailer every time someone uses a code on our website or clicks through to a sale.

We also make money by offering the brands we work with the chance to buy some extra space on our website, in turn giving more exposure to their biggest and best discounts. And that’s it! By using this model, we’re able to do what we do without charging our customers a penny.

Hi, I’m Jack; a Senior Copywriter on the vouchers team at Future PLC. Since joining in 2022, I’ve been crafting my money-saving skills in several areas, including tech, entertainment, sports, fitness, home and travel. You’ll usually find me here at MyVoucherCodes; updating users with money-saving hints, tips, discounts, and offers for hundreds of popular retailers. I can also be found on one of our other sites, TechRadar.

A former sports journalist and content creator, I decided to swap the press box for a permanent desk several years ago. Despite giving match reports the red card, I still enjoy attending live sporting events and I like to wind down by playing video games, visiting new places, and getting my head stuck into a good book.

Optimum Nutrition is a sports nutrition brand that provides high-quality products at affordable prices. Founded in 1986, they’ve since grown in popularity and can now be found in multiple retail stores and gyms nationwide.They specialise in protein shakes and muscle gainers and also have plenty of other products on offer such as vitamins, fitness accessories and gym clothing. Each product goes through extensive testing and is manufactured to the highest possible standards.