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.

Is Gold Standard 100% Isolate good for fast absorption?

Yes. Because it's made from ultra-filtered isolate with a portion hydrolysed into smaller amino acid chains, it digests quickly, which makes it well suited to the period straight after training when fast protein delivery is useful.

How do you use Gold Standard 100% Isolate?

Add one scoop to 180 to 240ml of cold water or milk and shake for around 30 seconds until mixed. Have it within 30 to 60 minutes of training, or any time of day to help reach your protein target. Most people use one to two serves daily depending on their goals and how much protein they get from food.

Is Gold Standard 100% Isolate gluten free?

Yes, it's gluten free. It does contain milk and soy (soy lecithin), so it isn't suitable if you need to avoid dairy or soy.

What does Gold Standard 100% Isolate stack well with?

• Creatine Supplements – the most evidence-backed pairing for building strength and size. Taken daily, it works through a different mechanism to support the muscle growth your protein is already feeding.
• Pre-Workout Supplements – taken around an hour before training for energy, focus and pumps, covering the front end of your session while isolate handles recovery afterwards.
• Glutamine or EAAs – a standalone amino can be useful intra-workout or during fasted training to support recovery on harder days, on top of the aminos this protein already provides.

When you want the cleanest, fastest-digesting protein in the Gold Standard range, Gold Standard 100% Isolate delivers exactly that. Shop now at Nutrition Warehouse.