Optimum Nutrition Reviews 

Nice! The products are one of the best! Very good for sports! Thanks

I can relate to some of the very positive reviews that I see. For more than a year, I was very happy with Serious Mass. Taste, mixability, and results. I recently moved to another corner of the world and found Serious Mass again. Not at all the same product inside the box (despite identical composition). "Serious Lumps" is how I call it now. Given the price, it is even more difficult to swallow. I would have given them 3 stars because I remember how pleased I once was with their quality. I am only giving them 2 stars now because they ignore mail messages --even if mine was simply pointing out the problem, not demanding a refund --more an explanation. The are losing a faithful, repeat customer.

ON customer service complete waste of time and useless. cant even reply back to my email. shouldn't be trading and i can't understand why people buy a brand where ON don't care about its customers.

Send me a bag that was split opened in middle and a worker thought it was ok to put tape on it and send it to me.

Replying back is very very very slow trying to get my refund is very hard I'm going around in circles since 16 January 2020 it's now 3rd of February

It's very stressful sending alot of emails with no answer and when they do replied you going nowhere.

Really are taking the p*ss , stay well clear don't like leaving one star but you people so deserve it pity I can't leave 0star

I bought serious mass and it's very good to gain weight.

Appalling customer service. Been waiting for a reply to my deficient batch for more than a week.

Simply and properly ignoring me, from their service ganblia

I placed an order day before yesterday and it was rejected as card decline. So, contacted the customer services, the guy informed me to send an email to and then he will pass it on to the correct department to find out why it was rejected as I tried it couple of times.
He told me that someone will get in touch with me as well I requested him some offer codes due to the inconvenience, but no one is bothered as I think they have made enough money to not to be bothering. The fact is They are claiming to be world wide hence can't order by phone. Customer service is just to answer your call and do nothing why hiring people at customer service if I have to write them email. I don't won't to east my time writing an emails. I want a quick resolution there and then. So Opt Nutri have you got answer to my online review?

ordered multivitamins, received 2 pots which are not legally to be sold in the UK i.e. french language across entire container, and even worse they are about 3 months before expiry date

thieves

will never, ever buy from them again

For anyone looking to hit the hym regularly, ON's protein is one of the best value:price wise. Great flavour, low sugar and a smooth shake for your troubles.

Four stars because i love the cake bites but i can't stop eating them resulting in farts that can strip paint from walls.

All in all, Gold Standard is the best whey protein I've used in the last maybe ten years. I'm giving four stars, because I think it's a little over-priced.

Useless. My address is too long so they could not send anything out. I had to go to another company

Excellent brand of supplements, have been using products for a number of years now and never been dissatisfied.

Great tasting protein!

An excellent brand with great selection of products. I've been using their whey protein and supplements for five years and have always purchased since. Great results, health wise and value for money.
Recommend fully, with no reservations. Two thumbs up!

always buy their protein and opti-men vitamins. Good quality. I feel healty, and have a progress in my trainings.