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Optimum Nutrition Voucher Codes UK

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Current Optimum Nutrition voucher codes and deals

  • 5 active offers
  • 0 voucher codes
  • 5 deals without a code
  • Up to 23% or £24
  • 16% Discount
    Updated: 5 November 2026
  • 17% Discount
    Updated: 5 November 2026
  • 23% Discount
    Updated: 5 November 2026
  • £24 Discount
    Updated: 5 November 2026
  • £24 Discount
    Updated: 5 November 2026

Codes checked on · Responsible: Marko, Technology and analysis · How we check · Advertising disclosure

Code not working? Let us know in the voucher window under “Did the code work?”. Your answers produce the line “Last worked … days ago” on the card.

Popular voucher codes in Sport & Fitness

  • 10% Discount
    Updated: 5 November 2026
  • Voucher code
    Updated: 5 November 2026
  • 12% Discount
    Updated: 5 November 2026
  • 10% Discount
    Updated: 21 October 2026
  • 25% Discount
    Updated: 5 November 2026
  • 5% Discount
    Updated: 5 November 2026

Optimum Nutrition voucher codes on save-up.co.uk apply at optimumnutrition.com, which sells protein powders, creatine, electrolytes, vitamins, weight gainers and pre-workout. Delivery is free over €50, and orders come from a distribution centre in Duisburg, Germany. The pages we read do not state a return period or payment methods. The merchant's terms on optimumnutrition.com are binding.

“If your basket is just under the €50 free-shipping threshold, look at the Bundles or Shakers sections before you enter a code. Then check in the basket that free shipping still shows once the discount is applied.”

— save-up.co.uk editorial team, eTaktiker GmbH

The date on a card shows when the list was last updated, not an expiry date.

Quick answers

How do I redeem an Optimum Nutrition voucher code?

Open the code on this page, add your products to the basket on optimumnutrition.com and paste the code into the voucher or promo code field in the basket or at checkout. Check the discount before you pay.

Can I use an Optimum Nutrition voucher code on reduced items?

Many codes exclude reduced items, and the products listed under Offers already carry a sale price. The terms of each code say whether sale items are included, so read them before you rely on a discount.

Does Optimum Nutrition offer a welcome discount?

The Optimum Nutrition pages we read do not name a welcome discount for new customers. The homepage shows free shipping over €50, and the current offers are listed under Offers on optimumnutrition.com.

Which terms apply to an Optimum Nutrition order?

The terms published on optimumnutrition.com apply, together with the conditions of the voucher itself. The competition terms on the site cover only Instagram giveaways for residents of the Republic of Ireland, not purchases.

How to use Optimum Nutrition voucher codes in 3 steps

  1. Find the shop

    Find any shop with the search; the Optimum Nutrition deals are at the top of this page.

  2. Open the deal

    One click opens Optimum Nutrition with the offer in a new tab.

  3. Save and tell us

    Check the price in the Optimum Nutrition basket and use the thumb to tell us whether the deal worked.

Redeem your voucher code at Optimum Nutrition

How to redeem a voucher code in the Optimum Nutrition checkout:

  1. Choose a voucher code on this page and click «Show code»; optimumnutrition.com opens in a new tab.
  2. Add the products you want to your basket.
  3. Paste the code into the voucher or promo code field in your basket or at checkout.
  4. Check that the discount and the delivery charge are correct before you complete your order.

Optimum Nutrition in numbers

  • Optimum Nutrition was founded in 1986; its About Us page describes the brand's origin as a dream in Illinois.
  • According to the brand's timeline, Optimum Nutrition distribution reaches 90 countries worldwide, and the same page says the brand is trusted in over 100 countries.
  • The optimumnutrition.com homepage advertises free shipping over €50.
  • The office and distribution centre is at Halle 5, Dr.-Wilhelm-Roelen-Str. 60-72, 47179 Duisburg, Germany.
  • Customer service is open Monday to Friday from 9:00 a.m. to 5 p.m. and can be reached in Ireland on +353 (01) 2630363.
  • Coach Optimum, an AI virtual coach, is available 24/7 and now answers out loud; you can speak or type questions on protein, training, nutrition and the products.
  • The online protein calculator works out your daily protein intake in under 60 seconds.
  • Optimum Nutrition giveaways are sponsored by Glanbia Performance Nutrition Limited, Glanbia House, Kilkenny, R95E866, Ireland, on behalf of its Optimum Nutrition brand.

Sources: About us, Homepage, Contact us, Competition terms and conditions.

Questions about Optimum Nutrition

Which company is behind Optimum Nutrition?

Optimum Nutrition is a brand of Glanbia. The brand's timeline records that it was purchased by Glanbia PLC, and the competition terms name Glanbia Performance Nutrition Limited, Glanbia House, Kilkenny, R95E866, Ireland, as sponsor acting on behalf of its Optimum Nutrition brand. The sources do not name a separate trading company for the online shop itself.

Does Optimum Nutrition offer free delivery?

Yes, the optimumnutrition.com homepage advertises free shipping over €50. The sources we read do not state the delivery cost below that amount or the delivery times. When you use a voucher code, check in the basket whether the order still qualifies for free shipping after the discount has been deducted, and look at the delivery charge before you complete the order.

Where does Optimum Nutrition ship orders from?

Orders are handled from the office and distribution centre in Germany. The contact page gives the address as Halle 5, Dr.-Wilhelm-Roelen-Str. 60-72, 47179 Duisburg, Germany. The page also has a heading for a return address, but no address is filled in under it, so ask customer service before you send anything back.

What products can I buy at Optimum Nutrition?

Optimum Nutrition sells protein powders, sports nutrition, creatine, amino acids, vitamins and performance supplements. The homepage bestsellers include Gold Standard 100% Whey Protein Powder, Micronised Creatine Powder, Serious Mass Weight Gainer, Platinum Hydrowhey, Gold Standard Pre-Workout and Gold Standard 100% Isolate Whey. A new Magnesium Glycinate+ product is also featured, alongside Clear Protein, electrolytes, energy products and collagen.

What is Coach Optimum at Optimum Nutrition?

Coach Optimum is the brand's AI virtual coach, which the About Us timeline calls the World's First AI-Enabled Virtual Coach. According to the homepage, it now talks back: you ask your question out loud and hear the answer straight away, or type it instead. It gives advice on protein, training, nutrition and Optimum Nutrition products and is available 24/7.

How do I contact Optimum Nutrition customer service?

You can call Optimum Nutrition customer service on +353 (01) 2630363, the Irish number given on the contact page. The opening hours are Monday to Friday, 9:00 a.m. to 5 p.m. The contact page also points to a Frequently Asked Questions section and a contact form. The sources we read do not give a customer service email address.

How long has Optimum Nutrition been making sports nutrition?

Optimum Nutrition has been making sports nutrition since 1986, which the brand describes as over 40 years. Its timeline lists milestones such as shifting the entire line to instantized protein, launching the first all casein protein, and pioneering the Anytime Energy & Recovery category. It also lists expanding Gold Standard into pre-workout, creating an interactive protein calculator and launching an AI-enabled virtual coach.

Can UK readers enter Optimum Nutrition Instagram giveaways?

No, the giveaways described in the competition terms are open only to residents of the Republic of Ireland aged 18 or over. They are void outside the Republic of Ireland. To enter, you follow the Optimum Nutrition Ireland Instagram page, like the giveaway post and tag a friend. Each person may enter once per Instagram account, and winners are drawn about five business days after the end date.

What does Optimum Nutrition say about returns?

The Optimum Nutrition pages we read do not state a return period, return conditions or who pays for return postage. The contact page has a heading for a return address, but no address is given beneath it. Before you return a product, check the Frequently Asked Questions on optimumnutrition.com or contact customer service, Monday to Friday from 9:00 a.m. to 5 p.m.

How does Optimum Nutrition help you choose products by goal?

Optimum Nutrition sorts its range by training goal under the heading «What Are You Training For?». The homepage lists six goals: Lean Physique, Build Muscle, Weight Management, Active Lifestyle, High Performance and Endurance. A «New to Supplements» area explains the basics for beginners, and the protein calculator estimates your daily protein intake in under 60 seconds.

Optimum Nutrition: protein, creatine and performance supplements from the Gold Standard brand

Optimum Nutrition is a sports nutrition brand founded in 1986 that sells its range directly at optimumnutrition.com. It is aimed at everyone from beginners who are new to supplements to people training for endurance, muscle gain or high performance. The shop covers protein powders, Clear Protein, creatine, electrolytes, energy products, weight gainers, collagen, magnesium and vitamins. With a voucher code from save-up.co.uk, your order costs less.

The Optimum Nutrition range from whey protein to magnesium

The shop menu is organised by product type, with a «Discover» page explaining each category and a «Shop» page listing the products. The flagship is Gold Standard 100% Whey, which the brand says leads its protein range. Newer additions such as Magnesium Glycinate+ sit alongside the established products, and a «NEW» section collects recent launches.

  • Protein: Gold Standard 100% Whey, Gold Standard 100% Isolate Whey and Platinum Hydrowhey
  • Clear Protein, made from whey protein isolate
  • Creatine: Micronised Creatine Powder and Platinum Creatine
  • Energy and pre-workout: Gold Standard Pre-Workout, Platinum Pre-Workout and Platinum Pump Pre-Workout
  • Weight gainers such as Serious Mass, plus electrolytes, collagen and the Elite line
  • Magnesium and vitamins, shakers and bundles

Shopping by goal with Coach Optimum and the protein calculator

Instead of browsing by product, you can start from a goal: Lean Physique, Build Muscle, Weight Management, Active Lifestyle, High Performance or Endurance. If you are unsure what you need, the protein calculator estimates your daily protein intake in under 60 seconds. Coach Optimum, the brand's AI virtual coach, answers questions on protein, training, nutrition and the products around the clock. It now talks back, so you can ask out loud and hear the answer, or type if you prefer. Recipes, blogs, expert advice and a «New to Supplements» guide complete the advice section.

Delivery and customer service at Optimum Nutrition

The homepage advertises free shipping over €50, and orders come from the office and distribution centre in Duisburg, Germany. Customer service is open Monday to Friday from 9:00 a.m. to 5 p.m. and gives an Irish phone number, +353 (01) 2630363. A FAQ section covers further questions. The pages we read do not set out a return period or the accepted payment methods, so check these on optimumnutrition.com before ordering.

How to save at Optimum Nutrition

The Offers section of the shop lists products at a sale price. Many voucher codes exclude reduced items, so compare a code on full-price products with the sale price before deciding. Bundles group several products together and can help you reach the €50 free-shipping threshold. Only one code can usually be used per order, so if several are available, try them in the basket and keep the one that saves most. If you shop across the category, you will also find Merachfit Voucher Codes, DKN Discount Codes, Berghaus Promo Code offers and a Mitre Voucher Code for further Sport & Fitness shops on save-up.co.uk.

Four decades of the Gold Standard

Optimum Nutrition's story runs from a dream in Illinois to distribution in 90 countries, and the brand says it is trusted in over 100 countries. Its timeline records shifting the entire line to instantized protein and launching the first all casein protein. Later milestones include the brand's purchase by Glanbia PLC, the Anytime Energy & Recovery category and the move of Gold Standard into pre-workout. The brand stresses in-house manufacturing and strict quality standards, controlling each step from sourcing to packaging. It also works with partners listed in the menu: the Irish Rugby Football Union and McLaren.