Gold Standard 100% Isolate by Optimum Nutrition

Gold Standard 100% Isolate by Optimum Nutrition is a premium whey protein isolate built for fast, clean recovery. Each serve delivers 25g of protein at around 80% purity, drawn entirely from whey protein isolate that’s been ultra-filtered to strip out excess fat, cholesterol and sugar. A portion is then hydrolysed, broken into smaller amino acid chains for faster digestion, making this one of the leanest, fastest-absorbing proteins Optimum Nutrition makes. Explore all of our Whey Protein Isolate options here.

With less than 1g of fat and just 1g of carbs per serve, it’s a low-calorie, high-purity protein suited to lean nutrition plans and anyone wanting maximum protein with minimal extras. Like the rest of the Gold Standard range, it’s instantised for easy mixing, Informed Choice certified and banned-substance tested on every batch.

Why choose Gold Standard 100% Isolate?

• 25g of protein per serve at approximately 80% purity
• Made entirely from ultra-filtered whey protein isolate, with a portion hydrolysed for faster absorption
• Less than 1g of fat and 1g of carbs per serve
• 5.5g of naturally occurring BCAAs and 4.3g of naturally occurring glutamine and glutamic acid per serve
• Instantised for easy mixing
• Informed Choice certified and banned-substance tested
• Gluten free

What’s the difference between Gold Standard 100% Isolate and Gold Standard 100% Whey?

Both are premium proteins from Optimum Nutrition, but they’re built differently. Gold Standard 100% Whey is a whey blend led by whey protein isolate and supported by whey protein concentrate, which makes it a great-value everyday protein. Gold Standard 100% Isolate is made entirely from isolate and is more highly filtered, so it’s purer, leaner and lower in fat, carbs and lactose. Choose the Isolate when you want the leanest, fastest-digesting option, and the Whey when you want a quality all-rounder at a more accessible price.