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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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
Great
122 reviews
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Item arrived open
Item arrived open, contacted customer services on 16th July and the response is not solving the problem. I want to RETURN for a replacement or refund, they are avoiding this. Will never order again and will just change to a different brand of product. Will be contacting my credit card provider for a chargeback
16 July 2026
Unprompted review
Excellent Products & First-Class Service
I’ve ordered from Optimum Nutrition UK several times now, and every experience has been excellent. The website is easy to navigate, ordering is straightforward, and delivery has always been quick and reliable.
The products are consistently high quality, and it’s reassuring to know you’re buying directly from the manufacturer. I also appreciate the regular offers and discounts, which make premium supplements even better value.
Overall, a company I trust for my sports nutrition needs, and one I’ll continue to buy from. Highly recommended.
18 July 2026
Unprompted review
Brilliant product...great taste and…
Brilliant product...great taste and super effective
16 July 2026
Unprompted review
I just love it!
15 July 2026
Unprompted review
Did we even needed to ask for 5 stars i…
Did we even needed to ask for 5 stars i mean its ON, just a bit pricey but you pay premium to get premium anyway.
8 July 2026
Unprompted review
Efficient response and quick delivery
Efficient response with good communication , and rapid delivery.
9 July 2026
Unprompted review
Have tried to contact about an order 3…
Have tried to contact about an order 3 times via email with no response. Tried calling and received automated message that ON is not contactable except via email. At a loss for what to do - customer is awful.
12 July 2026
Unprompted review
Sad but true - no,longer value for money
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. Sadly after nearly 20 years I am now having to explore other protein powders.
1 July 2026
Unprompted review
Product still not delivered yet its…
Product still not delivered yet its more than a week now
9 July 2026
Unprompted review
Good quality and mixes really well
Good quality and mixes really well. Nice taste
7 July 2026
Unprompted review
Excellent delivery service and…
Excellent delivery service and delicious product
29 June 2026
Unprompted review
May use AI-assist with repliesRead more
At Trustpilot, it's all about human content. This business can also access our AI-assisted response tool which helps them draft replies.
Normal procedure and amazing quality…
Normal procedure and amazing quality product.
2 June 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Jose,
Thank you for your kind feedback!
We're delighted to hear that everything met your expectations and that you're enjoying the quality of the product.
We truly appreciate your support and look forward to serving you again in the future.
Reply from Optimum Nutrition UK
Hi Rene,
Thank you for reaching out to us, and letting us know about your positive experience.
We're always here for you:)
Reply from Optimum Nutrition UK
Hi Hugo,
Thank you for your wonderful feedback.
Wish you a wonderful day ahead:)
Always good quality products
Always good quality products; promptly delivered.
1 June 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!!
11 June 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
7 June 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
28 May 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.
25 May 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:)
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