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Gold Standard 100% Isolate by Optimum Nutrition

4.8
Rated 4.8 out of 5 stars
95 Reviews
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  • Ultra-pure whey isolate
  • Fast digestion & absorption
  • Low sugar, no added fats

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Why not add some creatine?

Multiple benefits in a single scoop - complements every stack

Evidence-Backed Benefits
Add Creatine to every stack

Multiple benefits in a single scoop - complements every stack

Creatine supporting strength and power performance Creatine promoting muscle growth and faster recovery Creatine enhancing overall energy and training performance

Boost Strength & Power

Perform more reps, lift heavier weights, and maximise training performance

ENHANCE BRAIN POWER & MEMORY

Improves cognitive performance, reaction time, and working memory

SUPPORT BETTER SLEEP & RECOVERY

Linked to improved sleep quality and faster recovery from intense training

BACKED BY SCIENCE

Over 20 years of research prove creatine is safe and effective for athletes and everyday individuals.
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Description

Recharge your body with fast-absorbing, ultra-pure whey isolate. Optimum Nutrition put Gold Standard 100% Isolate through additional filtration most standard wheys skip, stripping out the extra carbs, fat and sugar so what's left is closer to pure protein. 25g per serve, just 1g of sugar, and none of the bulk you don't need.

Who this is Gold Standard 100% Isolate by Optimum Nutrition for

If you're already happy with a standard whey blend like Gold Standard 100% Whey, isolate isn't a mandatory upgrade, it's a specific tool for a specific goal. It suits anyone tracking macros closely, cutting toward a leaner physique, or who finds standard whey sits a little heavier than they'd like. The trade-off is cost: isolate runs more expensive gram-for-gram than a blend, since the extra filtration isn't cheap to produce. Compare it against the rest of our Whey Protein Isolate (WPI) range if you're still deciding which fits your routine.

Nutrition snapshot

  • 25g whey protein isolate per serve
  • 1g sugar, minimal carbs, no added fats
  • Fast-digesting, built for quick post-training absorption
  • Easy on digestion, mixes smooth with no grit

Getting it into your routine

A scoop in 180-240ml of cold water keeps it at its leanest; milk works too if you want more of a creamy shake. Straight after training is the classic window, but there's nothing stopping you having it earlier in the day if you're just trying to hit a protein target without extra carbs or fat tagging along. Comes in Chocolate Bliss, Rich Vanilla, Chocolate Honey Comb and Cookies & Cream, in 24, 44 or 76 serve tubs depending on how far ahead you want to stock up.

Rounding out your stack

Isolate covers the protein side, but most training routines lean on more than one supplement. A daily Creatine serve works well alongside it for strength and recovery, and a Pre-Workout beforehand covers the energy and focus side of training that isolate isn't designed to touch.

Common questions

Is this better than a regular whey blend?

Not better, just different. A blend costs less and still delivers a solid protein hit; isolate is for when you specifically want less sugar, fat and carbs alongside your protein.

Does it actually help with recovery?

Yes, 25g of isolate per serve gives your body a fast-absorbing protein and amino acid source right when muscles need it most after training.

Any downsides to going with isolate over a blend?

Mainly price, isolate typically costs more per serve than a standard whey blend, for a formula that's leaner rather than dramatically more effective for most goals.

For anyone who's serious about tracking exactly what's in their shake, Gold Standard 100% Isolate gives you the leanest version of the protein you're already after.

Directions

Mix 30 g (about 1 scoop) of whey isolate powder with 180-240 mL of cold water, milk, or your preferred beverage. Stir, shake, or blend for 30 seconds until fully dissolved. For best results, consume as part of a balanced diet and exercise program to meet your daily protein requirements.

Ingredients

24 Serves / Chocolate Bliss
NUTRITION INFORMATION Per serve / Per 100 g
Energy 461 kJ / 1502 kJ
110 kcal / 359 kcal
Protein 25 g / 81 g
Fat, total 0.5 g / 2 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 0 g / 0 g
Sodium 190 mg / 613 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

24 Serves / Rich Vanilla
NUTRITION INFORMATION Per serve / Per 100
Energy 442 kJ / 1462 kJ
106 kcal / 350 kcal
Protein 25 g / 83 g
Fat, total 0 g / 0 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 1 g / 3 g
Sodium 80 mg / 267 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Flavours, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

44 Serves / Chocolate Bliss
NUTRITION INFORMATION Per serve / Per 100 g
Energy 461 kJ / 1502 kJ
110 kcal / 359 kcal
Protein 25 g / 81 g
Fat, total 0.5 g / 2 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 0 g / 0 g
Sodium 190 mg / 613 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

44 Serves / Rich Vanilla
NUTRITION INFORMATION Per serve / Per 100
Energy 442 kJ / 1462 kJ
106 kcal / 350 kcal
Protein 25 g / 83 g
Fat, total 0 g / 0 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 1 g / 3 g
Sodium 80 mg / 267 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Flavours, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

44 Serves / Cookies & Cream
NUTRITION INFORMATION Per Serve / Per 100 g
Energy 459 kJ / 117 Cal / 1553 kJ / 366 Cal
Protein 25 g / 78 g
Fat, total 0.5 g / 2 g
- saturated 0 g / 0 g
Carbohydrate 3 g / 9 g
- sugars 1 g / 3 g
Sodium 200 mg / 625 mg

Ingredients - Hydrolysed Whey Protein Isolate †[MILK], Whey Protein Isolate †[MILK] (Emulsifier: †SOY Lecithin), Flavour, Dark Chocolate Cookie Crumbs (1.3%) (Sugar, Rice Flour, Cocoa Powder, Canola Oil, Salt), Salt, Sweetener (955).

Contains: MILK, SOY.

Nutrition information is intended as a guide and may vary slightly between flavours or over time. While we strive for accuracy, small differences can occur. For specific details on a particular flavour, please contact customer service.

76 Serves / Chocolate Bliss
NUTRITION INFORMATION Per serve / Per 100 g
Energy 461 kJ / 1502 kJ
110 kcal / 359 kcal
Protein 25 g / 81 g
Fat, total 0.5 g / 2 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 0 g / 0 g
Sodium 190 mg / 613 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

76 Serves / Rich Vanilla
NUTRITION INFORMATION Per serve / Per 100
Energy 442 kJ / 1462 kJ
106 kcal / 350 kcal
Protein 25 g / 83 g
Fat, total 0 g / 0 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 1 g / 3 g
Sodium 80 mg / 267 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Flavours, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

Shipping and Delivery

Orders placed before 3PM AEST, Monday to Friday (not including Public Holidays), will be shipped the same day! Once your payment clears and despatch information is available we'll email you an order tracking number. Most customers receive their supplements in 1-2 business days! As long as:

  • You order before 3pm (AEST) Mon-Fri
  • You use a payment method with instant clearance, like Paypal Instant Payment or Credit Card
  • Your parcel is less than 5kg in cubic weight. (Some bulky goods will not apply)
  • You are not in a remote location

Please note parcels going via Australia Post (PoBox, Defence Adresses) may take longer than 1-3 business days.

Parcels going to NT, and bulky parcels going to WA may take 5+ business days to arrive.

If your order weighs more than 5kg or is bulky: Heavy or bulky orders are sent via road freight which means that the estimated delivery time will be longer than orders sent via air freight.

If you have used an alternate payment method: Direct bank deposit or Paypal Echeque may take some time to clear. To get your supplements in the shortest time possible, use Paypal's Instant Payment or a credit card.

Shipping Policy
More Information

Recharge your body with fast-absorbing, ultra-pure whey isolate. Optimum Nutrition put Gold Standard 100% Isolate through additional filtration most standard wheys skip, stripping out the extra carbs, fat and sugar so what's left is closer to pure protein. 25g per serve, just 1g of sugar, and none of the bulk you don't need.

Who this is Gold Standard 100% Isolate by Optimum Nutrition for

If you're already happy with a standard whey blend like Gold Standard 100% Whey, isolate isn't a mandatory upgrade, it's a specific tool for a specific goal. It suits anyone tracking macros closely, cutting toward a leaner physique, or who finds standard whey sits a little heavier than they'd like. The trade-off is cost: isolate runs more expensive gram-for-gram than a blend, since the extra filtration isn't cheap to produce. Compare it against the rest of our Whey Protein Isolate (WPI) range if you're still deciding which fits your routine.

Nutrition snapshot

  • 25g whey protein isolate per serve
  • 1g sugar, minimal carbs, no added fats
  • Fast-digesting, built for quick post-training absorption
  • Easy on digestion, mixes smooth with no grit

Getting it into your routine

A scoop in 180-240ml of cold water keeps it at its leanest; milk works too if you want more of a creamy shake. Straight after training is the classic window, but there's nothing stopping you having it earlier in the day if you're just trying to hit a protein target without extra carbs or fat tagging along. Comes in Chocolate Bliss, Rich Vanilla, Chocolate Honey Comb and Cookies & Cream, in 24, 44 or 76 serve tubs depending on how far ahead you want to stock up.

Rounding out your stack

Isolate covers the protein side, but most training routines lean on more than one supplement. A daily Creatine serve works well alongside it for strength and recovery, and a Pre-Workout beforehand covers the energy and focus side of training that isolate isn't designed to touch.

Common questions

Is this better than a regular whey blend?

Not better, just different. A blend costs less and still delivers a solid protein hit; isolate is for when you specifically want less sugar, fat and carbs alongside your protein.

Does it actually help with recovery?

Yes, 25g of isolate per serve gives your body a fast-absorbing protein and amino acid source right when muscles need it most after training.

Any downsides to going with isolate over a blend?

Mainly price, isolate typically costs more per serve than a standard whey blend, for a formula that's leaner rather than dramatically more effective for most goals.

For anyone who's serious about tracking exactly what's in their shake, Gold Standard 100% Isolate gives you the leanest version of the protein you're already after.

Mix 30 g (about 1 scoop) of whey isolate powder with 180-240 mL of cold water, milk, or your preferred beverage. Stir, shake, or blend for 30 seconds until fully dissolved. For best results, consume as part of a balanced diet and exercise program to meet your daily protein requirements.

24 Serves / Chocolate Bliss
NUTRITION INFORMATION Per serve / Per 100 g
Energy 461 kJ / 1502 kJ
110 kcal / 359 kcal
Protein 25 g / 81 g
Fat, total 0.5 g / 2 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 0 g / 0 g
Sodium 190 mg / 613 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

24 Serves / Rich Vanilla
NUTRITION INFORMATION Per serve / Per 100
Energy 442 kJ / 1462 kJ
106 kcal / 350 kcal
Protein 25 g / 83 g
Fat, total 0 g / 0 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 1 g / 3 g
Sodium 80 mg / 267 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Flavours, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

44 Serves / Chocolate Bliss
NUTRITION INFORMATION Per serve / Per 100 g
Energy 461 kJ / 1502 kJ
110 kcal / 359 kcal
Protein 25 g / 81 g
Fat, total 0.5 g / 2 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 0 g / 0 g
Sodium 190 mg / 613 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

44 Serves / Rich Vanilla
NUTRITION INFORMATION Per serve / Per 100
Energy 442 kJ / 1462 kJ
106 kcal / 350 kcal
Protein 25 g / 83 g
Fat, total 0 g / 0 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 1 g / 3 g
Sodium 80 mg / 267 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Flavours, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

44 Serves / Cookies & Cream
NUTRITION INFORMATION Per Serve / Per 100 g
Energy 459 kJ / 117 Cal / 1553 kJ / 366 Cal
Protein 25 g / 78 g
Fat, total 0.5 g / 2 g
- saturated 0 g / 0 g
Carbohydrate 3 g / 9 g
- sugars 1 g / 3 g
Sodium 200 mg / 625 mg

Ingredients - Hydrolysed Whey Protein Isolate †[MILK], Whey Protein Isolate †[MILK] (Emulsifier: †SOY Lecithin), Flavour, Dark Chocolate Cookie Crumbs (1.3%) (Sugar, Rice Flour, Cocoa Powder, Canola Oil, Salt), Salt, Sweetener (955).

Contains: MILK, SOY.

Nutrition information is intended as a guide and may vary slightly between flavours or over time. While we strive for accuracy, small differences can occur. For specific details on a particular flavour, please contact customer service.

76 Serves / Chocolate Bliss
NUTRITION INFORMATION Per serve / Per 100 g
Energy 461 kJ / 1502 kJ
110 kcal / 359 kcal
Protein 25 g / 81 g
Fat, total 0.5 g / 2 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 0 g / 0 g
Sodium 190 mg / 613 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

76 Serves / Rich Vanilla
NUTRITION INFORMATION Per serve / Per 100
Energy 442 kJ / 1462 kJ
106 kcal / 350 kcal
Protein 25 g / 83 g
Fat, total 0 g / 0 g
- Saturated 0 g / 0 g
Carbohydrate 1 g / 3 g
- Sugars 1 g / 3 g
Sodium 80 mg / 267 mg

Ingredients - Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: SOY Lecithin), Flavours, Sweetener (955).

Allergen Statement - Contains Milk and Soy.

Nutrition information may vary slightly between flavours. For details on a specific flavour, please contact customer service.

Orders placed before 3PM AEST, Monday to Friday (not including Public Holidays), will be shipped the same day! Once your payment clears and despatch information is available we'll email you an order tracking number. Most customers receive their supplements in 1-2 business days! As long as:

  • You order before 3pm (AEST) Mon-Fri
  • You use a payment method with instant clearance, like Paypal Instant Payment or Credit Card
  • Your parcel is less than 5kg in cubic weight. (Some bulky goods will not apply)
  • You are not in a remote location

Please note parcels going via Australia Post (PoBox, Defence Adresses) may take longer than 1-3 business days.

Parcels going to NT, and bulky parcels going to WA may take 5+ business days to arrive.

If your order weighs more than 5kg or is bulky: Heavy or bulky orders are sent via road freight which means that the estimated delivery time will be longer than orders sent via air freight.

If you have used an alternate payment method: Direct bank deposit or Paypal Echeque may take some time to clear. To get your supplements in the shortest time possible, use Paypal's Instant Payment or a credit card.

Shipping Policy
4.8
Rated 4.8 out of 5 stars
Based on 95 reviews
Total 5 star reviews: 81
Total 4 star reviews: 10
Total 3 star reviews: 3
Total 2 star reviews: 0
Total 1 star reviews: 1
Slide 1 selected
96%would recommend this product
Rating
Ratings
Write a Review (Opens in a new window)
95 reviews
  • HB
    Hany B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Best protein for all your needs

    I’ve been using GSI for many years now and by far it’s one of the best if not the best for all your needs.

    The best tasting protein that I have tried and trust me I tried so many of them.

    Great for pre and after workout at the gym and can also help you gain or lose weight depending on your diet.

    If you’re looking for results then look no further.

    TasteRated 5.0 on a scale of 1 to 5
    TextureRated 5.0 on a scale of 1 to 5
    Value for moneyRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • AA
    Akash A.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Awesome Protein

    It does what is says, gained 300g muscle mass in 3 weeks. Recommend 100%

    TasteRated 5.0 on a scale of 1 to 5
    TextureRated 5.0 on a scale of 1 to 5
    Value for moneyRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • YM
    Yining M.
    Verified Reviewer
    I recommend this product
    Rated 4 out of 5 stars
    2 years ago
    Good protein

    It’s a good source of protein, but a little bit too sweet for me

    TasteRated 3.0 on a scale of 1 to 5
    TextureRated 4.0 on a scale of 1 to 5
    Value for moneyRated 4.0 on a scale of 1 to 5
    Was this helpful?
  • RP
    Ravinder p. S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    14 minutes ago
    Protein

    Very good value for money

    TasteRated 5.0 on a scale of 1 to 5
    TextureRated 5.0 on a scale of 1 to 5
    Value for moneyRated 5.0 on a scale of 1 to 5
    Was this helpful?
    Nutrition Warehouse
    4 minutes ago

    Thanks Ravinder! 🙌 So glad Gold Standard 100% Isolate is delivering great value for you 💪

  • TT
    Tyson T.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 days ago
    Gold Standard 100% Isolate by Optimum Nutrition

    Mixes well with water, tastes good no clumps or lumps - shake and go

    TasteRated 5.0 on a scale of 1 to 5
    TextureRated 5.0 on a scale of 1 to 5
    Value for moneyRated 5.0 on a scale of 1 to 5
    Was this helpful?
    Nutrition Warehouse
    2 days ago

    Thanks Tyson! 🙌 Love that Gold Standard 100% Isolate mixes so smoothly and tastes great - shake and go perfection! 💪

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