Whey Isolate
Gold Standard
Optimum Nutrition Gold Standard 100% Whey Protein Isolate 930g - Discount SupplementsOptimum Nutrition - 930g / Chocolate
Optimum Nutrition

Gold Standard Whey Isolate

★★★★★
4.92 | 71 reviews |  31 Servings
£41.99 £44.99 £1.35/serving
Lean Protein Hit 25g per serving
Cleaner Daily Shake Built for lighter, faster protein use
Isolate Pack Strong value for repeat use
Chocolate
Strawberry
Vanilla
Next Day · 30-Day Returns · UK Made
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Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication, or under medical supervision, consult your doctor before use. Do not exceed the recommended daily intake. Store out of reach of children.

Chocolate
Strawberry
Vanilla

Lean protein powder for lighter daily use

Optimum Nutrition Gold Standard 100% Whey Protein Isolate is a high-quality whey protein isolate powder designed to support your daily protein intake as part of a balanced diet.

Each serving provides 25g of protein and 110kcal (30.0g serving), with 1.3g of carbohydrates and 0.4g of fat. This macro profile suits anyone looking for a lean protein source that supports daily intake without excessive calories.

Each pack contains 31 servings, with a 30.0g serving size. Mix with water or milk as part of a daily routine around training or between meals. Consistent use tends to deliver better results than sporadic intake.

With a low fat and low sugar profile, it offers a clean and convenient way to increase protein intake. Ideal for everyday use, it can be mixed easily with water or milk, or added to smoothies, porridge and recipes for a versatile high-protein option.

Smooth, easy to mix and great-tasting, Gold Standard Whey Protein Isolate is a simple and practical way to add more protein to your daily routine.

Gold Standard Whey Isolate is manufactured by Optimum Nutrition. Contains milk and soy. May contain traces of gluten, egg, nuts and peanuts. Full ingredient and allergen details are listed on this page and on the product packaging.

Key Benefits

25g Lean Protein

Each 30g scoop delivers 25g of whey protein isolate - a premium, fast-absorbing protein source with a complete essential amino acid profile for muscle growth and repair.

Ultra-Low Carb & Fat

Just 1.3g carbohydrates and 0.4g fat per serving make GS Isolate ideal for cutting phases, body recomposition, and any dietary approach where macronutrient precision matters.

Rapid Amino Delivery

Additional filtering during manufacturing removes excess lactose, fat, and carbohydrates, allowing amino acids to reach muscle tissue faster - ideal immediately after training.

Pure Formula

Gold Standard Isolate uses whey protein isolate as its primary protein source with no protein matrix fillers, providing a clean, effective formula you can trust.

Frequently Asked Questions

What is the difference between Gold Standard Whey and Gold Standard Whey Isolate?

Gold Standard Whey is a blend of whey isolate, whey concentrate and hydrolysed whey at 24g protein, 1.3g fat and 113 calories per serving. Gold Standard Whey Isolate uses a 94% whey isolate blend at 25g protein, 0.4g fat and 110 calories per serving. The isolate version is leaner, lower in lactose and slightly higher in protein percentage, but comes at a higher cost per serving and with fewer flavour options.

Is Gold Standard Whey Isolate lactose-free?

It is not certified lactose-free, but whey protein isolate contains significantly less lactose than whey concentrate due to the additional filtration process. Most people with mild to moderate lactose sensitivity can tolerate whey isolate without issues. If you are severely lactose intolerant, a plant-based option like ON Gold Standard Plant Protein or ON Clear Protein would be a safer choice.

How many servings are in the 903g Gold Standard Whey Isolate tub?

The 903g tub provides 31 servings at 30g per scoop. At one shake per day, that lasts approximately one month. If you use protein twice daily, you will need a new tub roughly every two weeks. For a longer-lasting option in the ON range, the standard Gold Standard Whey 2.27kg provides 76 servings, though it uses a blend rather than pure isolate.