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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I don’t usually leave reviews. However, from someone who has constant gut issues, this is the only whey I’ve found (so far) which is the easiest on my stomach. Even whey isolate from USN etc hits my s... See more
Super fast delivery, next day now! Products are great, lots of choices and flavours to choose from. From a leading nutrition and performance brand, I wouldn’t expect anything else, that’s why I don’t... See more
Great flavour, mixes well without leaving any lumps like some other brands. I find that going a little bit bigger on the scoop size adds to the consistency and flavour. Morning after a heavy sessio... See more
Company details
Written by the company
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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4.0
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122 reviews
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Reply from Optimum Nutrition UK
Hi Ian,
We truly appreciate your kind words.
Your feedback is really valuable to us, and we wish you a wonderful day ahead:)
Great service
Great service, great products & full selection of training supplements
May 30, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Maria,
Thank you so much for your wonderful feedback.
We're always here for you, and we wish you a lovely day ahead:)
Really liked the Milk Chocolate flavour…
Really liked the Milk Chocolate flavour — tastes good and mixes well. What I liked most is that it feels very light compared to many other protein powders, so it’s been easy to include in my daily routine. Overall, a very convenient protein option.
May 25, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Krishnaraj,
Thank you for the lovely feedback — we’re really glad to hear you’re enjoying the flavour.
We wish you a wonderful day ahead:)
Good quality protein
Good quality protein. Extreme milk chocolate flavour is really good 😊
May 19, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Anil,
Thank you for your kind words, and we're glad to hear that you enjoy the flavor.
We wish you a wonderful day ahead:)
Great service and emails with info so…
Great service and emails with info so 5/5 for that, only just changed from another brand to this. I will see if it’s all what it’s cracked up to be. I will give it a go for 3 months and see.
May 23, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello,
Thank you for the great feedback — we’re glad to hear the service has been a positive start for you.
If you ever want help with future orders or have questions about other products, we’re here anytime.
Amazing customer service & brill product
May 23, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Helen,
Thank you so much for your kind words — we really appreciate it.
We wish you a wonderful day ahead:)
Optimum Nutrition Gold Standard Whey is…
Optimum Nutrition Gold Standard Whey is my ultimate go-to protein powder, offering fantastic mixability, rich flavors, and excellent muscle recovery support. Buying directly from the official ON website is a breeze thanks to its clean, highly intuitive layout and fast checkout. The delivery service is exceptionally quick, with orders arriving securely packaged and ahead of schedule. It is a premium product backed by seamless direct shipping, making it highly recommended.
May 7, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Manish,
Thank you so much for your wonderful feedback — we truly appreciate it.
If you ever need help with future orders or have questions about other products, we’re always here for you.
Reply from Optimum Nutrition UK
Hi Amin,
Thank you so much for your lovely feedback.
We're here for you, whenever you need assistance:)
Terrible delivery
Terrible delivery! The order is processed by Shopify who only allow a limited number of characters in the address section so I could not advise my full address.
The delivery failed because the driver could probably not find my address.
I called Optimum Nutrition but they do not take calls and only emails. It’s been a few days and still no response to my email.
May 12, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Faisal,
Thank you for sharing your experience, and we’re very sorry for this.
We’ve checked our system and unfortunately haven’t been able to locate any email from you. Could you please double‑check the address you contacted us on and reach out to us again, so we can resolve this for you as quickly as possible?
We’re ready to help as soon as we receive your message.
This product is essential for me in the…
This product is essential for me in the form of capsules which easier to take great quality thank you .
If you could produce the amino acid LEUCINE EN CAPSULES ON HIS OWN. I WILL BE VERY GRATEFUL.
May 16, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Lexx,
Thank you for sharing your kind words with us:)
We wish you a wonderful day ahead.
Used these products for a long time and…
Used these products for a long time and many different ranges but recent batch of 25g high protein strawberry shakes all had clumps in, must have been a bad batch.
May 3, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi William,
Thank you for your review. This definitely shouldn’t happen, and we’d like to look into it properly.
Could you please reach out to our customer support team via email so we can assist you further?
Looking forward to assisting you further:)
Trusted company & excellent service
Always on time and excellent product quality
May 12, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Bill,
Thank you for your kind words, and we're glad to hear that you are enjoying our enjoying our services.
We're always here for you when you need assistance:)
Reply from Optimum Nutrition UK
Hi Matt,
Thank you for your wonderful feedback.
We're glad to hear, that you are enjoying our products. Wishing you a wonderful day ahead.
Optimum Nutrition was 5 stars order…
Optimum Nutrition was 5 stars order tracked, arrived when said and correct, but the delivery firm was awful, left package outside front door in full view of passers by, when behind back gate was stated as drop of place, lucky to be still there when I returned, won't be ordering again as not worth hassle if it went missing. Change your delivery firm and will be used again.
May 6, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Warren,
Thank you for sharing your experience, and we’re truly sorry about the way your parcel was delivered.
When we provide the tracking link, the courier’s app sometimes restricts delivery to safe places or neighbours — many customers prefer this option, but in your case it clearly didn’t work as intended. We’re glad the package was still there, and we’ll escalate this with the courier so it doesn’t happen again.
We're always here for you when you need assistance:)
Delivery and production on high quality
Delivery and production on high quality
April 29, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Jakub,
Thank you for sharing your kind words with us.
We're always here for you.
Almost impossible to get in touch
Something went wrong when l placed the order l guess "auto fill" put in half post code wrong. That's not ON fault still COULD NOT CALL them, Return email say "not monitored" it gives options for other emails to use of which the Eu one is incorrect! ("server not found") .. Three days later l found them on fb they answered me "a couple of days later.. THANKS GOD FOR THE DELIVERY-MAN Out of the lot (DPD clerks included say we can't change any of tge address must be done by the sender EVEN IF THAT post code was NON existing)) He was the only one who took it on himself look at "safe space" where l put the right post code and deliver.
May 5, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Corrado,
I’m really sorry you had to go through all of that.
Unfortunately, our phone line is not currently in use, and it looks like there was a technical issue with the email inbox you tried to reach. That problem has now been fixed, but it absolutely should not have happened in the first place.
We’re here for you if you ever need support again — you can always reach us directly through customer support.
The best protein supplement out there
The best protein supplement out there. Total value for money.
May 5, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Prasanna,
Thank you so much for the kind words.
We're always here for you:)
Hands down the best protein I have ever…
Hands down the best protein I have ever had. The flavor is incredible and it mixes perfectly without any clumping. I’ve finally found my go-to supplement and will definitely be purchasing again. Huge thanks to the team for a top-tier product!
May 6, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Jess,
Thank you so much for the amazing feedback.
Enjoy every scoop!
I paid it said dispatched and nothing…
I paid it said dispatched and nothing arrived.
May 4, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Ian,
Thank you for taking the time to leave your feedback, and I’m truly sorry to hear about your experience with the delivery.
I’ve checked our records and can see that you already reached out to our customer service team, and a resolution has been provided. I’m glad you were able to get support, and we sincerely apologize for the inconvenience you faced along the way.
We're always here to help:)
Great whey protein
I bought strawberry flavor and i’d say best whey you can get in both terms of quality and taste
April 16, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Mohsen,
Thank you so much for you kind words.
We are truly happy to hear, that you had a positive experience with us:)
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