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
How this company uses Trustpilot
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Please use an alternative. Don't be tricked
Just wanted to update you on the poor service from both Optimum Nutrition and their courier service. Basically, they use Evri, which is a very poor courier service. I ordered on the 14th, delivery was delayed by Evri (not a surprise) and noted on 18th November. No update or delivery whatsoever. I email Optimum Nutrition on 22nd November asking for an update. They mention that basically the only thing they can do is open a postal investigation and it will take up to 7 working dates (10 more days waiting for my order). I ask for a refund and they have refused until their investigation with their courier is completed, so basically, nothing happens, I didn't receive anything and I have to wait to get my own money back. Please order from Myprotein or another store that is reliable and really gives great service. The only reason why I came here is that Myprotein were out of stock. These guys are just lads trying to run a poor business.

Reply from Optimum Nutrition
I'm giving 1 star as you cooperate on…
I'm giving 1 star as you cooperate on Amazon with the fitness scammer Patryk Baranski who scamms and cheats people on diet plans. You can do more research about him just google Patryk2703 Trustpilot reviews

Reply from Optimum Nutrition
Package is stuck in transit with…
Package is stuck in transit with courier EVRI. No one is interested in helping out. Optimum Nutrition customer service is nonexistent. (Don't answer the phone)
EVRI customer service number is a premium number £6 plus phone company access charge.
Taking my business elsewhere
Shocking delivery times
Ordered my items over a week ago, still no delivery or any update on when this will be. They use Evri for deliveries, shocking service.
I have used optimum nutrition for years…
I have used optimum nutrition for years and used to get great results from the serious mass and now I don’t use it anymore since they updated their formula in 2020 I really can’t stomach the new formula it tastes so bad and artificial and the old serious mass formula used to taste great now the flavours are horrendous I'm not sure what has happened but I don’t understand why they changed there flavours when they worked so well for years without any problems. If you can remember the old flavours then you know what I mean. I’m very disappointed with why they have done this and now have gone with a different brand until they decide to go back to their original formula I won’t be using it again it’s just not the supplements it used to be.
Superb customer service (Shan)
I placed an order a week ago and the protein bag had a whole and the powder was spilled. I wroteto their customer service and the respone and support i received from Shan was so professional.
I was offered a full refund or a replacement and I've gladly chosen a new bag as a replacement.
Thank you Shan. Thank you ON.
Will return and shop from your website again for sure.

Reply from Optimum Nutrition
Unprofessional, scumbag company full of liars
Do not order this powder directly from the website. They lie about the time that it takes to ship. I ordered the extreme milk chocolate on the 13th, i selected 3-5 business days and these guys still have said it's "in transit".
They make decent protein powder I can't lie, it probably is the best bang for your buck so I will give them 1 star for that.
Just got extreme milk chocolate protein…
Just got extreme milk chocolate protein and it tastes amazing. However, 4 stars as delivery was really late and customer service wasnt really helpful (but kind!)
Still waiting on my product
Still waiting on my product, was supposed to arrive on Tuesday - still no sign of it.
First time customer, likely to be the final time.
Damage product sorted straight away
Always loved the double rich chocolate but I ordered the largest size which has gone up a fair amount but in these times it’s understandable.
Once received I was disappointed to see a rip in the bag and a fair amount had fallen out so I emailed their customer service expecting a voucher or a smaller one sent out but was surprised when they offered to send out a new one of the same size and they replied to an emailed with around 30 minutes apologising and getting it sorted straight away. Obviously this was not the fault of optimum nutrition but the carrier but the service was second to none.
Fantastic service from Katie and a very happy customer
Absolutely dreadful customer service…
Absolutely dreadful customer service and delivery service. The product was meant to be delivered by 16th July and still not delivered. I asked the delivery company they replied we have returned the product back to the sender. Now I am at their portal waiting from day to get hold of them.
Poor customer service - illness
Received a bad-batch product which was inedible. Provided feedback to customer team and filled in the details to test the batch no. Received patronising customer service and no solution. For such a big brand, that I have enjoyed the product of for a while, it seems weird to lose customers over poor customer service, as is the theme of these other reviews!!
They delete reviews. Only show 5 stars.
Few months ago ordered gold standard protein milk chocolate flavour. Box was damaged and lost my free protein bars but that's fine. After few weeks of investigation they offered some discount for next purchase which never take place. The bad thing is the taste is not nice and I have reflux after drinking it. I was trying to leave review on their site where there is 1600+ and it's 5 stars average. Only few 4 stars. Haven't seen any less. I wrote review with 2 stars but unfortunately they didn't published. They just deleted. They only show good things and hide the bad ones.
The currie company they use have failed…
The currie company they use have failed to deliver my order for over a week, their customer service is the worst I have ever experienced, have been nothing but polite but yet have had the phone put down on me several times, I have since bought the products ordered of a different manufacturer and dealing with Optimum Nutrition has been nothing but a waste of time and to date a waste of money, thankfully I have purchased via PayPal so a dispute has been raised through their support
Misleading website
Misleading website.
Homepage banner is offering the strength and size bulk for €79.99, but when attempting to make a purchase price jumps to €95.20.
I was really close to placing an order without noticing the price difference and probably plenty of other customers too. Some might have ordered and paid over €15 extra without knowing.
I contacted customer service via Facebook, it’s been over two weeks and I have yet to receive a response.
Extremely disappointing.
Best sport supplements
Best sport supplements.
good quality + fast effects
But price is a bit high
Optimum Nutrition manufactures the best…
Optimum Nutrition manufactures the best sports supplements out there. I really like and find beneficial their mass gainers.
I bought Optimum Mass gainer
I bought Optimum Mass gainer, The powder leaves half of the cup as a foam and i cant swollow that so half of the powder is wasted each time. I contacted customer service with order number they refused to exchange they said to contact the retailer. The retailer says to contact manufacture just disappointed :(
Worst customer service
Was ordering for long time. But last time are worst. Parcel disappeared. Customer service not answering. USELESS! Waist of money. Optimum Nutrition production in UK are FAKE!
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