Quick answer
Optimum Nutrition Gold Standard 100% Whey is one of the most popular protein powders in the world. In the UK, it is stocked by Amazon, Holland & Barrett, Discount Supplements, Dolphin Fitness, and many other retailers, each at a different price. Because ON does not sell direct-to-consumer in the UK, prices vary significantly between retailers. The difference between the cheapest and most expensive seller for the same product can be 20 to 30 percent on any given day.
Why prices vary so much
Unlike MyProtein or Bulk, which control their own pricing, Gold Standard Whey is a third-party brand sold through independent retailers. Each retailer sets its own margin, runs its own promotions, and may hold different stock levels, all of which affect price.
This makes Gold Standard Whey one of the products that benefits most from price comparison. The same tub can be £5 to £15 cheaper at one retailer versus another.
Current cheapest options
Prices change frequently, so rather than listing a price that will be outdated within a week, the best approach is to check the ProteinDeals comparison table and search for "Gold Standard" or "Optimum Nutrition". This shows the live price per 100g across every retailer we track, updated weekly.
Which size is best value?
Gold Standard Whey comes in 450g, 908g (2lb), 2.27kg (5lb), and occasionally 4.54kg (10lb) sizes. As with all protein powders, the larger sizes offer significantly better value per 100g.
The 2.27kg tub is typically the sweet spot, offering most of the bulk discount without committing to 10lb of a single flavour. The 908g tub is convenient but costs 20 to 30 percent more per 100g.
Community perspective
What others are saying
I used to use ON Gold Standard exclusively, but due to the high cost I moved across to MyProtein. Low cost, high quality, good flavors. I now get all my protein, creatine, protein cookeis etc from them. Top tip: Never buy anything on there full price. There is always a sale or coupon code to use to get 10%+ off usually 20-30%
u/squeezedfish in r/gainit
Any reason why you specifically want ON? If you live in the UK, you probably have easier access to one of the best protein supplements on the market, MyProtein. It tops the labdoor rankings in both value and content.
u/HaricotNoir in r/gainit
Anecdotes are useful for spotting recurring taste, texture and convenience issues, but they are not evidence of effectiveness.
Is Gold Standard Whey good value?
Gold Standard Whey is a whey protein blend (a mix of isolate and concentrate). It delivers around 79g of protein per 100g, which is solid but not exceptional, since pure whey isolate products offer 85 to 90g per 100g.
In terms of price per 100g, Gold Standard typically costs more than own-brand products from MyProtein or Bulk. You are partly paying for the brand name and the consistency of taste and quality that ON is known for.
For a direct value comparison, check how Gold Standard stacks up against other options on the cheapest protein powder page. If you are open to trying other brands, you may find significantly cheaper options with equivalent protein content.
Cheapest Optimum Nutrition Whey
Gold Standard 100% Whey Protein Powder
Optimum Nutrition · 600g
Tips for buying Gold Standard at the best price
- 1
Compare across retailers. The price spread on ON products is larger than on direct-to-consumer brands.
- 2
Check the protein powder deals and discount codes for active codes at stockists.
- 3
Amazon Subscribe and Save can give an extra 5 to 15 percent off the listed price.
- 4
Buy the 2.27kg size or larger for the best per-100g value.
- 5
Black Friday and Amazon Prime Day typically have the deepest ON discounts.