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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3.9
Great
125 reviews
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Package seal doesn't work
I bought the 4.5kg of whey protein so I can have it for a long time, and although the protein itself is of great quality (absolutely the best), the packaging just doesn't seal properly.
I tried it in all possible ways, but it's just faulty and will not stick no matter what. It's a pity, because now I have to use other ways to close it and it's definitely not air-tight. You should review your production line because something is not working well.
January 30, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Andre,
Thank you for letting us know, and I’m really sorry you’ve had to deal with this.
We completely understand the situation, and we really appreciate you taking the time to point it out. We’ll make sure your feedback is passed on to the right team so we can work on improving this moving forward.
If there’s anything else you need, we’re here to help. Wishing you a lovely day ahead!
My order hasn't arrived
My order hasn't arrived, I ordered it a week ago!
January 26, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Samuel,
Thank you for reaching out to us, and apologize for the inconvenience.
Unfortunately, it looks like your package was returned to us, since the delivery was not successful. A refund has been processed for you.
Thank you for your understanding. You can of course place a new order, and we're here to assist you further.
Best all round whey protein you can buy.
February 1, 2026
Unprompted review
Recommended but electric blue colouring unecerssary!
The product was recommended for its benefits and effectiveness but I have to say why on earth do they need to put an electric blue colouring in it? Adding silly colourings for no benefit? Don’t think I can use it as it contains this which I had no idea about when I purchased.
February 1, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Nicholas,
Thank you for your message, and we’re really sorry for the inconvenience.
We completely understand your concern and we will definitely escalate your feedback to the relevant team.
To make sure we pass this on accurately, could you please confirm which specific product this is regarding?
You can reach out to our customer support team via email, and we’ll make sure your feedback is properly reviewed.
Wishing you a wonderful day ahead!
All good, will be a repeat customer
Second time buying from Optimum Nutrition. Easy ordering from website, fast delivery, quality product.
January 29, 2026
Unprompted review
Easy to navigate, lots products, good deals.
Easy to navigate, lots of products to chose from, speedy delivery,
February 1, 2026
Unprompted review
Fast Delivery, Great Taste & Long Expiry
Ordered Optimum Nutrition on the evening of Friday 23 January and was really impressed with the speed — shipped on Monday and delivered on Tuesday.
The tub arrived completely sealed and intact, with a great expiry date (almost 2 years). I ordered the Extreme Milk Chocolate flavour: there’s a very slight sweetener taste, but nothing overpowering, and the overall chocolate flavour is actually really good. Mixes well and goes down easily.
Very happy with both the product and the service — would definitely order again.
January 27, 2026
Unprompted review
Best quality
January 28, 2026
Unprompted review
Loved the Selection Options
Loved the Different flavours option and specially the quantity Options .
Recommend 👍
January 28, 2026
Unprompted review
Horrible Delivery Service and customer support
My order, which was scheduled for delivery on Thursday, 22/01/2026, has still not reached me. I would like to highlight the issues I have faced so far:
Thursday:
I was informed that the courier could not deliver my order as “no one was present.” This is incorrect. I live in a student accommodation with a 24/7 reception, and no delivery attempt was made. I also did not receive any call from the delivery agent. I was then notified that my parcel had been redirected to a collection point nearly 50 minutes away from my address. After calling customer support, I was told the parcel would be redelivered on Monday.
Monday:
I waited for the parcel, but instead received another notification asking me to collect it. When I contacted customer support, the call was disconnected after a long wait. I called again, and after another delay I was informed that the delivery driver had not picked up my parcel for redelivery on Monday. I was assured the matter would be escalated and the parcel would arrive on Tuesday (27/01/2026). However, today I received the same collection email once again after which i called the courier again and they said the goods are now being returned to sender.
I tried Optimum nutritions help desk number but the automated voice told me that they have suspended calls and i should email them. I have sent but 2 emails and i have not gotten any response on their end whatsoever.
This experience has caused significant inconvenience and highlights major issues with communication, delivery accuracy, and customer support. I request that this matter be investigated urgently and that my parcel be delivered to my address as originally scheduled.
January 27, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello,
Thank you for taking the time to share your experience, and I’m truly sorry for the delay and the frustration this situation has caused.
I also want to apologise for the delay in our response. Your emails were not ignored; our team has been actively working in the background to resolve this and has already escalated the issue with the logistics company. According to the latest update, your parcel is expected to be delivered today.
If, for any reason, the delivery still doesn’t happen, please rest assured that you will not lose your money. We can request the parcel to be returned to us and will be more than happy to arrange either a replacement or a full refund — whichever works best for you.
We genuinely appreciate your patience, and we’re committed to making sure this is resolved properly for you. If you need anything else, we’re here to help.
Very fast delivery
January 21, 2026
Unprompted review
Good product but way too expensive
nice product of a good quality, far too expensive for what it is though and alternatives are about of similar quality for a lower cost.
January 19, 2026
Unprompted review
Always arrives quickly
Always arrives quickly. Large selection of quality supplements.
January 18, 2026
Unprompted review
Avoid
Parcel still in Birmingham. Have asked for a refund for a week. Customer service now just ignoring me. Don’t want the product anymore. Shocking service.
January 1, 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Ryan,
I’m really sorry to read about your experience — no one should have to chase a refund for a week or feel ignored.
We’ve checked your order, and unfortunately the parcel couldn’t be delivered and was returned to us by the courier. As soon as it arrived back, a full refund was issued (19th of January), so you should already have received your money back.
If anything still looks unclear on your end or you need further support, we’re absolutely here for you and ready to help.
Best protein powder around
Great service and product. Ordered late afternoon and got it next day
Quality of product is great and mixes really well.
Good job!
January 14, 2026
Unprompted review
They are the best
January 14, 2026
Unprompted review
I have not received my order
I have not received my order.
A glitch in the system meant it was delivered to the wrong address (a previous address) however my PayPal whicbinised to pay has only got my new address so not sure how their system picked that up and now I am down a large sum of money £64 with no product to show for it.
So sadly not great.
For reference Apparently this is still being investigated but I ordered on the 29th December.
December 29, 2025
Unprompted review
Reply from Optimum Nutrition UK
Hello Tamara,
We’re very sorry to hear that you haven’t received your order. After reviewing the details, we can confirm that the delivery address entered during checkout matches the address linked to your PayPal account.
Our courier has confirmed that the parcel was delivered to this address. As this is now not your current residence, we kindly recommend reaching out to the current occupants to see if they can assist in retrieving the parcel.
We truly understand how frustrating this situation is, and we’re sorry for any inconvenience caused.
Unfortunately, as the order was delivered to the address provided at the time of purchase, we’re unable to take further action from our side.
Wishing you a wonderful day ahead, and a prompt resolution!
Best protein in UK
Delivered next day, and always the best quality.
More expensive than the rest but its so good. Never causes issues with my stomach, and mixes so easily.
January 10, 2026
Unprompted review
Chocolate is the best
Delivery was very quick. I bought it in the black friday sale so decent value for Money.
I went with 2 different chocolate options. Previously I had the vanilla ice cream flavour which I found sickly sweet after a few weeks.
I'd like to try other flavours but I'm commitment shy.
December 1, 2025
Unprompted review
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