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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What people talk about most
Reviews shaping this summary
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
129 reviews
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
Replied to 90% of negative reviews
Typically replies within 2 weeks
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Fantastic always have a deal on product…
Fantastic always have a deal on product is great.Ive been training over 35yrs and this product is as good as it gets.
many thanks, Spencer
2 April 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Spencer,
Thank you so much for your lovely feedback:)
We're happy to hear that we are a part of your journey.
Reply from Optimum Nutrition UK
Hello,
Thank you so much for your kind feedback. We're happy to hear that you had a positive experience with us.
Wishing you a wonderful day.
Fast delivery and clear tracking 📦
Fast delivery, proper tracking updates, well packaged, everything arrived as expected.
26 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Abe,
Thank you for your feedback. We are happy to hear that everything arrived as expected, and we hope that you enjoy your products:)
Have a lovely day ahead.
Reply from Optimum Nutrition UK
Hi Kadzz,
Thank you so much for your feedback-we truly appreciate it.
Wishing you a lovely day ahead:)
great love this
1 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hi Bi sa,
Thank you so much for your kind words. We're glad to hear that you had a positive experience with us!
great company and fab products
great company and fab products, from a monthly subscriber
1 February 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Oli,
Thank you so much for your kind words.
It means a lot to have you with us:)
Powders & tablets arrived quickly and…
Powders & tablets arrived quickly and exactly as I expected.
23 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Neil,
Thank you for your review.
We're happy to hear everything arrived on time, and just as you expected!
We wish you a lovely day ahead:)
Overall best
Chocolate flavor great taste
Easy digestibility
Good price
Delivered on time
15 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Manbahar,
Thank you for your feedback.
Delighted to hear you’re enjoying the product.
Have a wonderful day:)
Reply from Optimum Nutrition UK
Hi Jasmine,
Thank you for your wonderful feedback.
Wishing you a lovely day ahead!
DPD have not delivered
DPD have not delivered, you have not replied to emails, no working phone number. Have reached via FB and insta and no luck getting hold of anyone. Looks like I will have to resolve via my bank. Company has been useless
11 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello,
I’m really sorry you’ve had such a difficult time trying to reach us.For the moment, the best way to contact us is via email, and we’re here to help with anything you need.
I’ve checked your case, and I’m happy to confirm that your refund has already been issued, so the funds will be on their way back to you.
If there’s anything else you’d like us to look into or if you need further support, we’re right here and ready to help.
The 4.5 kg bag does not reseal - been 10 days no response from Customer Services
I ordered the 4.5 kg resealable bag of protein from Optimum Nutrition, but the bag I received does not reseal at all. I even tried removing the protein stuck around the zipper to see if that was the issue, but the zipper simply won’t close.
For a product that costs over £120, this is extremely disappointing. The resealable feature is important for maintaining freshness and convenience, especially for such a large bag.
What makes the experience worse is that I contacted their support team via email and it has been over 48 hours with no response. I expected much better customer service from such a well-known brand.
Overall, very disappointed with both the product quality and the lack of customer support.
8 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Chirayu,
Thank you so much for reaching out, and I’m really sorry you’ve had such a frustrating experience.
I’ve passed your feedback on to the relevant team, because issues like this genuinely help us improve our packaging and overall quality.
I also checked on our side, and we unfortunately couldn’t find any email from you. It’s possible it didn’t come through, so I’d really recommend sending it again. Once we receive it, we’ll be more than happy to look into this properly and get things sorted for you.
Thanks again for your patience — we’re here to help you further regarding this.
I love these protein powder!
I love these protein powder!! I’ve bought the vanilla Gold standard Isolate and the Whey cookies and cream and the flavour is absolutely delicious 🤤 it mixes smooth as well. And oh delivery was fast.
4 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Janine,
Thank you so much for your lovely feedback.
Really appreciate you sharing your experience, and we're here for you whenever you need assistance:)
Order said delivered to collection…
Order said delivered to collection point but wasn’t. Dpd says contact seller. Well thats not so easy! Optimum nutrition have a phone line but after sitting and working my way through the annoying machine, you can’t actually talk to anyone and directed to email. Unacceptable customer service
2 March 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello,
I’m really sorry for the trouble you’ve had, and we would absolutely like to assist you further.
Our phone line is unfortunately not available at the moment, which is why callers are redirected to email support.
Since you haven’t provided any order details here, the fastest way for us to help is for you to reach out to our customer support email with your order number. Once we have that, we’ll absolutely do our best to assist you right away.
We're looking forward to hearing back from you, and resolving this matter for you.
Great customer service
24 February 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Adam,
That you so much for your feedback:)
Wishing you a wonderful day ahead.
Excellent product and speedy customer service
Excellent protein - great taste (especially the double chocolate), mixes easily with my oats and equally good as a shake.
I did a price comparison and decided to order straight from ON website as it was the most cost effective.
I buy this protein with confidence and would highly recommend it.
28 February 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Inga,
Thank you so much for sharing your experience.
We really appreciate your trust and recommendation.
We're always here for you.
Great flavor and excellent supplement
Great flavor and excellent supplement
2 February 2026
Unprompted review
Reply from Optimum Nutrition UK
Hello Aaron,
Thank you so much for your kind words:)
We're always here for you when you need assistance!
When I started training finding the…
When I started training finding the right protein was an issue , tried few other protein powders that was hard to mix and Heavy to drink . But when I tried Gold standard whey protein found best whey protein in UK market, very easy to mix and much easier to drink.
Very good customer service friendly helpful and pleasant staff, I never had any complaint about the product quality and service and on time delivery.
22 January 2026
Unprompted review
Very happy recommend 100%
8 February 2026
Unprompted review
Good service/product not up to expectations
Customer service was really good. Unfortunately the creatine I got was gritty and the flavour was really not nice (orange). A really expensive mistake to make
12 February 2026
Unprompted review
No issues....all on time as per order.
5 February 2026
Unprompted review
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