MyProtein vs Optimum Nutrition

Overview: MyProtein Impact Whey Protein

MyProtein Impact Whey Protein is the brand's value-leader blend. Each 25g scoop delivers 22g of protein from whey concentrate, plus 1g of fat and 1g of carbs. By selling direct-to-consumer from its UK and US warehouses, MyProtein cuts out the retailer markup that competitors carry. Bulk 5.5lb (2.5kg) tubs routinely land in the $44-$55 range after flash-sale discounts, which is industry-leading cost-per-gram.

The catalog is enormous: Chocolate Smooth, Vanilla, Strawberry Cream, Salted Caramel, Cookies & Cream, Banana, Tiramisu and 25+ other flavors rotate through the lineup. Impact Whey is Informed-Sport tested on key SKUs and is sold to professional athletes worldwide. The trade-off is that it ships from a single fulfillment center; expect 3-5 day delivery instead of Prime same-day.

Overview: Optimum Nutrition Gold Standard 100% Whey

Optimum Nutrition Gold Standard 100% Whey is the best-selling whey protein in the world. Launched in 1986 and refined continuously since, Gold Standard delivers 24g of protein per 30g scoop from a blend of whey isolate (primary), whey concentrate and whey peptides. The flagship Double Rich Chocolate and Vanilla Ice Cream flavors have set the benchmark for whey taste for two decades.

Gold Standard is stocked everywhere: GNC, Bodybuilding.com, Walmart, Target, Amazon, Costco, iHerb and Tiger Fitness. The 5lb tub sits at $55-$65 at most retailers and dips to $50 during sales. ON is owned by Glanbia (the largest dairy processor in Ireland), giving the supply chain pricing leverage few brands can match.

Side-by-Side Comparison

Value Score Comparison

This is one of the closer head-to-heads on the site because both brands have built their reputations on value:

• MyProtein Impact Whey wins on absolute price-per-gram. After a 40% off code (which runs roughly twice a month), Impact Whey lands at $44-$48 for 5.5lb, beating Gold Standard's best price by $10-$15.
• ON Gold Standard wins on protein quality per scoop (isolate-primary vs concentrate) and on availability (you can buy it tonight at any Walmart in America).

Verdict: Which Should You Choose?

Pick MyProtein Impact Whey if:

• You drink protein daily and need to minimize cost-per-gram
• You can time purchases around MyProtein flash sales
• You want a deep flavor catalog (Salted Caramel, Tiramisu, Banana)
• You don't mind 3-5 day shipping windows

Pick ON Gold Standard if:

• You want the isolate-primary blend (cleaner macros than concentrate-only)
• You shop in-person at GNC, Walmart, Target or Costco
• You want the world's most-reviewed protein (500K+ Amazon reviews)
• You value 24g protein per scoop vs Impact Whey's 22g