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
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Review summary
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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
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 rou... See more
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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
Great
107 reviews
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Always good quality products
Always good quality products; promptly delivered.
June 1, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Craig,
Thank you for your lovely feedback- we truly appreciate it:)
We're always here for you!
Didn’t receive my order!
Didn’t receive my order!! Emailed but no reply!!
June 11, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Vincent,
Thank you for reaching out, and we truly apologize for the inconvenience.
Our customer has already reviewed your email, and have reached out to you to provide a resolution. Could you kindly have a look, and get back to them so that they can get this sorted out for you?
We're always here if you need further assistance, and we wish you a wonderful day ahead.
Reply from Optimum Nutrition UK
Hello Viorica,
Thank you for your kind words. We're glad to hear, that you have a positive experience with us.
We're always here for you!
Most amazing product and professional…
Most amazing product and professional service
June 7, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi BravoP,
Thank you so much for your wonderful feedback.
We wish you a wonderful day ahead, and hope to see you soon:)
Is always a pleasure to have good deals…
Is always a pleasure to have good deals so thank you
May 28, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Amz,
Thank you so much for your feedback.
We're truly glad to hear, that you are making the most of our deals. We're here for you whenever you need us:)
Long Standing Customer
I have been a long term customer of Optimum Nutrition. Their products are fantastic and I have never had any issues with them. The delivery has always been efficient and products arrive in a timely and safe manner.
May 25, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Syed,
Your kind words mean the world to us.
We truly thank you for it, and we're always here for you:)
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:)
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