I order 2 * 5kg bags of protein and one of them arrived damaged with a large split down the side of the bag spilling the contents into the delivery box. After 3 weeks of emailing ON customer services... See more
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I have been ordering from ON since Jan 2026 since Amazon is restricting the amounts. This time when I ordered, UPS lost a case, I filed a claim with UPS, but was frustrated after not being able to re... See more
I've ordered one 5kg bag of protein powder, and after almost two weeks it hasn't arrived. I've sent an email as well with no response so far.
Company which pushed their product through subscription which cant be canceled. When you try it this message "Your subscription contract is frozen by your shop owner." interrupt the process. Highly re... See more
Company details
Information provided by various external sources
Optimum Nutrition: Creators of 100% Whey Protein (The Worlds #1 Protein Powder), Pro Complex, Diet Products, Strength and Recovery Supplements, and other health and nutrition products.
Contact info
United Kingdom
- www.optimumnutrition.com
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
Replied to 8% of negative reviews
Typically replies within 1 week
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First class service as always 😊
These negative comments are unbelievable lol. Been using Optimum Nutrition Gold Standard whey protein, and pre workout for past three years. Would never think of using anything else. As quite simply they are the best. There website is well layed out, and so straightforward to order. Email notifications are sent as soon as my order is placed. And again when my items are posted. Tracking and delivery is first class too. Never yet waited more than four days for my products. Keep up the great work Optimum nutrition. If it wasn't for your great products, I wouldn't be in the brilliant shape I am now. 😊👏🏽👏🏽👏🏽

Reply from Optimum Nutrition
No problems, just another online purchase.
Ordered on the 20th Apr, 2x 100% whey protein double choc 2.27kg. Got tracking from FedEx cross border, items being sent from NL and another tracking from Evri who would deliver rest of the way once in the UK.
Received items today 25th Apr, packaged well and both tubs inside had outer and inner seals intact. My experience was 10/10 and I will order again if the prices are still good.

Reply from Optimum Nutrition
Order never arrived - customer service awful
Order never arrived and had little to no communication. Thankfully Klarna will investigate. Shocking as I've used the products a long time. Pretty disappointed, would never order again.

Reply from Optimum Nutrition
I don’t recommend due to collaboration…
I don’t recommend due to collaboration with Patryk2703. He sells your products on Amazon. Nutrition company Solgar Poland already withdrew the contract with him

Reply from Optimum Nutrition
No option to cancel & no 'code not valid' error
This company does it's best to mislead people. I applied a code for 20% off and got a message saying that the code was accepted. I clicked "Review & pay" but instead of being able to review, and see that the code was not applied, it just placed the order. There is no option to cancel an order even if u create an account. There is some small print that says you can cancel by telephone but only within 10 minutes of the order. I tried but they don't answer the fone.
I emailed twice, many hours before the item was dispatched but that apparently isn't good enough. Customer service wasn't available on the weekend.
An email from the company just says I can refuse delivery but I'm pretty sure they'll find a way to keep my money if I do that.
I've asked for details of how to return but I'm sure they'll make that difficult too.
Very shoddy service for such a big company.
The ON Gold standard protein in French Vanilla is the best I've found so it's a shame the website and process lets them down.
The product is available £20 cheaper in a local store so I'll stay off the website in future!

Reply from Optimum Nutrition
Not sure what all the negative reviews are about
Not sure what all the negative reviews are about personally.
Ordered directly for some whey protein and pre workout (I usually get it from the gym but they were out of stock on the flavour I like)
I ordered while half asleep in the morning before work and got the wrong flavour, so I rang them and Shan was very helpful and refunded me straight away and also kindly sent me the 15% off code I initially used so I could order again.
No issues at all, ordered again and it's being delivered through DHL and not evri...
Honestly they probably get hundreds of orders per week and seems like only a few have had issues with their orders, and in my experience the customer service was great.
Will definitely be ordering from them again. The only downside is that the price of the protein is a little high, but most proteins are these days.

Reply from Optimum Nutrition
Avoid like the plague
Avoid. Surprised a leading brand like this could be so shoddy. I've never had to raise a credit card dispute before but they simply ignore emails and tweets for non-delivery. They also use Evri which means there's more than a chance your order won't turn up. Terrible experience all round.

Reply from Optimum Nutrition
Misleading/Mediocre website, Poor Customer Support
Order Nr ONUK71470834
Ordered a present for my nephew for 127gbp. There was a promotion going for a free backpack. They also basically forced me to use a welcome discount code. Their mediocre website accepted 2 of those codes without any error or notification. i intentionally set up my order in order to receive a backpack. So i thought everything is all right and we were waiting for the package to arrive to the UK from their storage in NL. Little did i know that a welcome discount code and the minimum order amount code for the backpack are not stackable.(makes sense? no). To sum up, me and my nephew are disappointed.
Also i had to use VPN, otherwise, the website always showed an error. (great start for shopping).
SUBTOTAL: £ 146.97
DISCOUNT: £ 19.95
SHIPPING COSTS: £ 0.00
TAX: £ 21.17
TOTAL: £ 127.02

Reply from Optimum Nutrition
Why did I not check reviews before I…
Why did I not check reviews before I ordered still waiting for delivery till date looking at other reviews I don’t think I will get my order please be warned go buy from other websites and make sure you read reviews first stay away from this company even with 50% off save your self you will end up loosing money and time .

Reply from Optimum Nutrition
I bought creatine from this company…
I bought creatine from this company after opening it stinks of godless diesel and there is a black protective sticker. After taking it, I vomited for two days and had a headache. They do an investigation very bad service.

Reply from Optimum Nutrition
I ordered few items around 1st January
I ordered few items around 1st January. It was showing that i will get it in 6th Jan. I waited all day no one came to deliver. Tried calling the customer on 10 Jan informed about it to customer representative Shan, he said he will look into it did not hear anything after that. On 17th January called again another agent picked some lady don't know her name. She said it will be resolved within 2days , she was not even listening to the query properly. I asked her what if it is not resolved in 2 days she said they will refund the money in that case. I asked her to send me the proof of discussion in a email which she said she will do, but she did not. I also asked her if there is by way i can collect it from the delivery company as they don't seem to be delivering and it's long time. But she kept saying will be resolved in 2 days.
On 24 January i emailed again to check if it is resolved if not cancel and return. It's 4 days now still no response.
well optimum Nutrition is big brand and they have great products. But their customer service is just shameful.
Below is the header from the only mail i got from the lm
Re: [#460371] Incoming call with 447423710554 on Tue, Jan 10 at 11:57:15 AM

Reply from Optimum Nutrition
Why has serious mass changed its formulas? The original formula was the best!
Please optimum nutrition can you go back to your original serious mass flavours? They tasted so good! The new formula of serious mass tastes so bad and has a really bad aftertaste to it!! At least if your going to change the product surely you would make it better not taste worse. It used to be the best mass gainer but now sadly isn’t anymore really needs improvement!!

Reply from Optimum Nutrition
A truly awful outfit
A truly awful outfit.
3 weeks after placing my order still not had my refund or delivery of the product.
Chased the matter on several occasions, always seem to reach the same customer call handler - who will regularly hang up the phone, and unable to resolve the issue. Avoid this company at all costs. I would pay more for a product with one of the competitors, just to avoid this cowboy service.
** emailed and called on more occasions than I care to remember. Please don't mislead people into thinking you are good at customer service***

Reply from Optimum Nutrition
Package lost, not refunded.
I put one star because I couldn't put zero. Ordered for 120€ of products in November, they used a cheap courrier, package was lost, I contacted them for a refund and they said that they would wait to receive to package back to issue a refund. I told them that this problem was between them and the courrier and that I shouldn't have to wait for a refund, still no money back. Avoid this company at all costs.

Reply from Optimum Nutrition
Why have they changed the formula of the serious mass?
The old formula of the serious mass flavours were the best especially the strawberry one the new formulas that they have now taste so artificial and have a weird aftertaste any chance you could go back to the original flavours? The new formulas are so bad

Reply from Optimum Nutrition
Awesome staff
Awesome staff! Hailey and Nick are huge assets to the company. Informative and helpful. Plus funny as hell! Only place I go to for supplements
Avoid Or Be Prepared To Get Angry
This company have one staff member here in the UK who is going under the false name of Shan. He is young and very inexperienced in customer service but is well-oiled in the art of blagging customers when it comes to missing orders, replacements or refunds. Take your time to read the countless reviews all saying they are being ignored when orders go missing.
I have written a letter which I am going to send to the owners of Optimum Nutrition about the poor standard of service many people are experiencing here in the UK. The company head office will not be aware of this so I will be making sure they will be fully in the picture.

Reply from Optimum Nutrition
Customer services are shocking
Customer services are shocking, ordered protein for my partners birthday on 08/11 and still not got it. Says it was delivered raised a query with them. Still nothing. His birthday was over a month ago, paid for it and not got my money back. Keep chasing and now I'm getting no reply!!

Reply from Optimum Nutrition
I tried the gold standard before it was…
I tried the gold standard before it was okay and tasted good too but recently I bought their 100% whey Isolate chocolate flavor and it's too sweet due to the artificial flavors in it - I couldn't find the amount of sucralose in it anywhere on the internet and I tried to call their customer service or "product specialist" who couldn't help at all she just kept saying "they don't show the percentage of sucralose in the products"
I still can't understand why would they hide this information - it's important to us consumers to know exactly how much of it is in our protein.
No Refund and Courier choice is Worse
Do not use Optimum Nutrition they refuse to refund your money and use a very cheap courier called Evri who did not deliver and since the 22nd November I have still had not parcel and no refund. Avoid at all cost you are better getting goods from elsewhere.

Reply from Optimum Nutrition
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