Cheapest Gold Standard Whey Protein UK (2026)

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 20-30% 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 their own margin, runs their own promotions, and may have different stock levels affecting price.

This makes Gold Standard Whey one of the products that benefits most from price comparison - the same tub can be £5-£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Prices change frequently, so rather than listing a price that will be outdated within a week, the best approach is to check the WheyWise comparison table and search for "Gold Standard" or "Optimum Nutrition".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 - it offers most of the bulk discount without committing to 10lb of a single flavour. The 908g tub is convenient but costs 20-30% more per 100g.

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 - pure whey isolate products offer 85-90g 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.

Optimum Nutrition Gold Standard 100% Whey Protein

900g bag

Optimum Nutrition Gold Standard delivers 24g protein per scoop and holds 4.6 stars across 55,000+ Amazon UK reviews. The default benchmark whey for buyers who want proven consistency over the lowest cost.

Buy Gold Standard 100% Whey Protein →See the price on Amazon

Optimum Nutrition Gold Standard 100% Whey Protein

900g bag

Pros

• + 24g protein per scoop blended WPI WPC and hydrolysate
• + Most reviewed whey protein on Amazon UK with 55,000+ ratings
• + Instantised formulation mixes cleanly in cold water
• + 20+ flavour range with Double Rich Chocolate consistently 4.6 stars

Cons

• – Premium price tier above MyProtein and Bulk
• – Contains soy lecithin and artificial sweeteners
• – Smaller 450g tubs poor value vs 900g and 2.27kg sizes

Pros

• 24g protein per scoop blended WPI WPC and hydrolysate
• Most reviewed whey protein on Amazon UK with 55,000+ ratings
• Instantised formulation mixes cleanly in cold water
• 20+ flavour range with Double Rich Chocolate consistently 4.6 stars

Cons

• Premium price tier above MyProtein and Bulk
• Contains soy lecithin and artificial sweeteners
• Smaller 450g tubs poor value vs 900g and 2.27kg sizes

Buy Gold Standard 100% Whey Protein →See the price on Amazon

●Nutrition per scoop · 23.6g protein in 31g▼

Protein makes up 76%

of this 31g scoop · 114 kcal total

23.6g

4.4g

Protein23.6g

Carbs1.6g

Fat1.4g

Other4.4g

Tips for buying Gold Standard at the best price

• Compare across retailers - the price spread on ON products is larger than on direct-to-consumer brands
• Check the protein powder deals and discount codes for active codes at stockists
• Amazon Subscribe & Save can give an extra 5-15% off the listed price
• Buy the 2.27kg size or larger for the best per-100g value
• Black Friday and Amazon Prime Day typically have the deepest ON discounts