Optimum Nutrition vs Myprotein: Price Comparison 2026
3,153 products across 85+ retailers
Live UK prices from both brands, ranked by cost per 25g of protein. Updated weekly.
Optimum Nutrition vs Myprotein: Price Comparison 2026
Live UK prices from both brands, ranked by cost per 25g of protein. Updated weekly.
Optimum Nutrition
Products tracked
104
In stock
88
Avg cost per 25g protein
£1.60
Cheapest product
Optimum Nutrition Gold Standard 100% Plant Protein 684g – Vegan Protein Powder | 24g Protein — £0.75/25g
Myprotein
Products tracked
18
In stock
13
Avg cost per 25g protein
£1.39
Cheapest product
Myprotein Vegan Protein Blend, Banana, 1kg — £0.51/25g
On average, Myprotein is currently £0.21 cheaper per 25g of protein than Optimum Nutrition. Individual products vary — check the table below.
Showing 122 products from Optimum Nutrition and Myprotein — prices updated weekly
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Optimum Nutrition vs Myprotein — The Full Picture
Optimum Nutrition and Myprotein are two of the most popular protein brands in the UK, but they target different ends of the market. Optimum Nutrition (ON) is best known for Gold Standard Whey — a gym staple sold across dozens of third-party retailers. Myprotein sells direct and relies on frequent sales and discount codes to undercut on price.
This page compares every product from both brands side by side using live UK pricing, normalised to cost per 25g of protein. Because ON products are stocked by many retailers, you will often see the same product at different prices — the table shows the cheapest available option for each.
Prices are checked weekly. Myprotein tends to be cheaper on paper, but ON's pricing is more stable and you rarely need a discount code. Use the table below to see which brand offers better value right now.
Frequently Asked Questions
Is Optimum Nutrition better quality than Myprotein?
Optimum Nutrition Gold Standard Whey consistently tests close to its label claims and uses whey isolate as the primary ingredient. Myprotein Impact Whey is a concentrate-first blend that delivers solid protein content at a lower price point. Both are reputable — ON is generally considered the premium option, while Myprotein wins on value.
Why is Optimum Nutrition more expensive than Myprotein?
ON uses whey isolate as the first ingredient in Gold Standard, sources from established US manufacturing, and sells through third-party retailers who each add margin. Myprotein manufactures and sells direct, cutting out the middleman. The price gap reflects distribution model as much as ingredient quality.
Where is the cheapest place to buy Optimum Nutrition in the UK?
Prices vary significantly across retailers. Use the comparison table above to find today's cheapest price — we track ON products across 85+ UK retailers and update weekly.