Just bought the new clear protein (incentivised by the free creatine). Good change from whey with a nice clean taste. Originally looking to buy Gold Standard but at nearly £100 a tub that was a no go.... See more
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Review summary
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Delivery was next day an products are outstanding. The only protein I’ve been able to digest within 10-15 minutes of training window without digestion issues. Would highly recommend this product for... See more
Company replied
I’ve been using this product for years but first time I’ve ordered direct from the manufacturer. I am so impressed. The price was great. Next day delivery was fantastic with an hour allotted deliver... See more
Can't fault the product, nor the service. Prompt delivery and an issue resolved quickly, without fuss and to a level of service that made me take note - in a good way. Won't hesitate to buy direct... See more
Company details
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Optimum Nutrition. Setting the Gold Standard in Sports Nutrition. For more than 35 years, Optimum Nutrition has been dedicated to providing athletes, fitness enthusiasts, and active individuals with the highest quality sports nutrition products in the world. Recognised globally as The World’s #1 Sports Nutrition Brand, Optimum Nutrition is trusted by millions of customers who strive every day to achieve their health and fitness goals. Our philosophy is simple: quality you can trust, products you can rely on, and results that help you perform at your best. From our state-of-the-art production facilities, we control every stage of the manufacturing process — from sourcing premium raw ingredients to rigorous quality testing — ensuring that every product meets our uncompromising standards. Best known for Gold Standard 100% Whey, the world’s best-selling whey protein powder, we also offer a wide range of products to support performance, recovery, endurance, and everyday wellbeing. Whether it’s protein powders, pre-workouts, creatine, or vitamins and minerals, each supplement is formulated with science, innovation, and the needs of active people at the forefront. At Optimum Nutrition, we are proud to support both professional athletes and everyday consumers. Our mission is to empower everyone to unlock their potential through safe, effective, and great-tasting nutrition. We continually invest in research, education, and innovation to ensure we remain at the forefront of sports nutrition. When you choose Optimum Nutrition, you choose the Gold Standard in quality, trust, and performance.
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3.9
Great
224 reviews
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It’s a fraud
It’s a fraud, Fraudster stolen my card from my phone app and ordered.
Not sure how that can happened. Any idea?
15 October 2026
Reply from Optimum Nutrition UK
Hello,
Thank you for bringing this to our attention.
We're very sorry to hear about your experience. Our Customer Care team is currently assisting you directly regarding this matter.
We appreciate you taking the time to flag this issue to us, and we're going to do our best to resolve this for you:)
Damaged Product, No Refund and Customer Service That Doesn’t Respond
Extremely disappointed with Optimum Nutrition UK. For such a well-known brand, their customer service has been appalling.
My order arrived on 15 October with the protein powder bag split open and powder spilled throughout the box. I immediately contacted customer support and provided photographic evidence.
On 16 October, they requested additional photos of the delivery label and external packaging, which I provided the same day.
Since then, complete silence.
I followed up by email again on 19 October and have still received no response. I’ve also tried calling their customer support number, only to hear a recorded message saying they’re not taking calls. I’ve even contacted them through Instagram, but they’ve ignored that message too.
It’s now 21 October, and I’m still left with a damaged, unusable product, no replacement, no refund and absolutely no update.
To make matters worse, they’ve now sent me an automated email asking me to review my experience on Trustpilot, despite not bothering to resolve my complaint.
It’s incredibly frustrating that a company can take your money but then be virtually impossible to contact when something goes wrong.
I’ve made every reasonable effort to resolve this directly, but I’m getting nowhere.
I expected much better from Optimum Nutrition. All I’m asking for is a replacement or a refund for a product that arrived damaged. It really shouldn’t be this difficult.
ON461312
13 October 2026
Reply from Optimum Nutrition UK
Hi Luke,
Thank you for reaching out to us.
Please be assured that your case has been escalated to our logistics partner, and an investigation has been initiated regarding the damaged delivery. Unfortunately, we are unable to provide a resolution until the investigation has been completed.
We appreciate that this process has taken longer than expected, and we apologize for the lack of communication during this time. We will continue to monitor the case. Once the investigation has concluded, we will be able to provide the appropriate resolution.
Thank you for your patience and understanding while this matter is being reviewed.
Love this product
Love this product! No hidden ingredients. Tastes amazing. I have it everyday. Realy quick delivery. 100% reccomened ordering from here if you need these kimd of products. No hidden ingredients. I always buy from here when im running low!
6 October 2026
Reply from Optimum Nutrition UK
Hi Carrie,
We are glad you enjoyed your experience with our natural products and prompt shipping. It is wonderful to hear that our items have become a reliable part of your daily routine. We appreciate your kind recommendation and look forward to your next order.
Great products delivered fast.
Not only do they offer a great range of products, they also deliver them quickly.
Always developing new products to suit the market too.
6 October 2026
Reply from Optimum Nutrition UK
Hi Ben,
We are glad you enjoyed your experience with our fast delivery and our dedication to constantly creating new items for our selection. Thank you.
Certified/batch-tested products range
I love ON because of its quality of the products, especially the certified/batch-tested range that is particularly valuable for me as an athlete.
12 October 2026
Reply from Optimum Nutrition UK
Hi Marti,
We are glad you enjoyed your experience with our products. We appreciate your feedback regarding our certified testing, which we know is vital for athletes.
Reply from Optimum Nutrition UK
Hi Gary,
We are glad you enjoyed our quick shipping and great value. Thank you for your feedback.
Reply from Optimum Nutrition UK
Hi,
Thank you so much for you kind words and feedback.
We're always here for you:)
I’ve tried all other brands in…
I’ve tried all other brands in everything from pre workout to whey protein powder and bars, but none like ON you’re the best.
5 October 2026
Reply from Optimum Nutrition UK
Hi Tunde,
We are happy to hear that our protein products and pre-workouts stand out as your top choice. We appreciate your great support.
Reply from Optimum Nutrition UK
Hi Neil,
We are happy to hear that our fast processing and swift shipping met your expectations. Thank you for your feedback.
Reply from Optimum Nutrition UK
Hi Declan,
We thank you for your feedback regarding our pricing, and we're absolutely going to escalate this matter further.
Wishing you a wonderful day ahead:)
i’m really happy and grateful for you
i’m really happy and grateful for you, service guys. OPTIMUM NUTRITION ♾️
1 October 2026
Reply from Optimum Nutrition UK
Hi Zaid,
We are glad you enjoyed our service. We appreciate your kind feedback.
Reply from Optimum Nutrition UK
Hi Natalie,
Thank you for reaching out to us.
We understand that taste is very subjective, and we're sorry that this product did not meet your expectations.
If you would like further assistance, please feel free to contact our Customer Support team. We'll be happy to review your experience and see whether there is anything we can do to help.
ON products and services
Always great products and delivered very quickly. I would not hesitate to use Optimum and will continue to do so!
7 October 2026
Reply from Optimum Nutrition UK
Hi Danny,
We are glad you enjoyed your experience with our fast shipping and quality items. We appreciate your support and look forward to serving you again.
But add some more flavours for choices…
But add some more flavours for choices (isolate )
29 September 2026
Reply from Optimum Nutrition UK
Hi,
We are glad you enjoyed our isolate. We will work on adding more flavor options.
Received a partial delivery
Received a partial delivery from DPD with item missing from my order. After sending an email reply saying they were checking with logistics partner, support has completely stopped responding to any follow-up emails. Their contact number does not work at all. Expecting an update or resolution is impossible with this unresponsive support.
8 October 2026
Unprompted review
Delivery was next day an products are…
Delivery was next day an products are outstanding.
The only protein I’ve been able to digest within 10-15 minutes of training window without digestion issues.
Would highly recommend this product for anyone looking to take their training to the next level.
6 October 2026
Reply from Optimum Nutrition UK
Hi Samuel,
We are glad you enjoyed your experience with our swift delivery and high-quality items. We are happy to hear that our formula is gentle on your stomach during your post-workout routine. Thank you for recommending our selection to others looking to improve their fitness results.
Reply from Optimum Nutrition UK
Hi Marcila,
We are glad you enjoyed our tasty food and prompt service. Thank you.
Reply from Optimum Nutrition UK
Hi Lee,
We are glad you enjoyed our tasty items and fast shipping. Thank you.
Never received the order or the money…
Never received the order or the money back. Order placed on the 28 September and today is 12 October
28 September 2026
Reply from Optimum Nutrition UK
Hi Laura,
Thank you for your feedback.
We're happy to confirm, that your order was received back and a full refund has been processed.
Thank you again for your understanding, and we're always here when you need us:)
Expensive product fast delivery
21 September 2026
Reply from Optimum Nutrition UK
Hi RCW,
We appreciate your feedback. We are glad you enjoyed the quick delivery, and we hear your thoughts on our pricing.
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