Optimum Nutrition Gold Standard Whey Isolate

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To create Optimum Nutrition Gold Standard 100% Isolate, Optimum Nutrition started by selecting only the highest quality whey protein which undergoes a series of sophisticated filtration processes to ‘isolate’ out excess fat, cholesterol and sugar. A portion of this Whey Protein Isolate is then hydrolyzed – broken down into smaller chains of amino acids – for easier digestion. The final product is a fast digesting complete protein containing no more than 1 gram of carbohydrates, less than 1 gram of fat and more than 80% pure protein per serving. They put in the hard work to assure super quality, so you can focus on achieving ambitious performance goals.

Optimum Nutrition Gold Standard 100% Isolate features:

  • Hydrolyzed & ultra-filtered Whey Protein Isolate
  • 1 Gram of carbs per serving
  • At Least 80% Protein per serving
  • Delicious taste mix with cold water
  • 5.5 Grams of naturally occurring BCAAs
  • 4.3 Grams of naturally occurring Glutamine & Glutamic Acid
  • 11.4 Grams of naturally occurring Essential Amino Acids
  • Gluten free


Container Size: 744g (1.64LB)
Serving Size: 1 Scoop 31G
Servings Per Container: 24

Container Size: 2.28KG (5.02LB)
Serving Size:  1 Scoop 31G
Servings Per Container: 76

Please Note: Nutritional Information is to be used as a guide only, actual values may differ between flavours and sizes and when formulations are modified or updated by the manufacturer. 
Contact us if you have any questions regarding this products ingredients.


All orders $40 and over receive Free* Shipping Nationwide 

Estimated Delivery Times*:
Auckland – Overnight (However many Auckland orders are be delivered the same day depending on what time the order is placed)

North Island - Overnight

South Island – Overnight (For larger parcels allow 2 business days)

Same Day/Evening Express Shipping upgrade available at checkout for select suburbs*

Click here to view the full Shipping Details and Returns Policy.


Optimum Nutrition Gold Standard 100% Isolate Reviews

4.85/5 based on 105 customer reviews

Overall Rating

9.7 /10

105 Ratings

Average Flavour Rating

9.7 /10

5 Flavours

Top Rated Flavour

10 /10

Chocolate Bliss

  • 5/5

    10/10 Chocolate Bliss

    As usual delivered quickly, got it on sale for $136. Tastes good, texture is good, not gritty and meets my protein requirements for the day.
  • 5/5

    7/10 Chocolate Bliss

    10/10 Rich Vanilla

    Love this product. Not heavy at all and doesn't give you that bloated feeling a lot of protein powders give. I've been having it in my daily smoothies and ive lost 9KGs, its the only part of my diet and exercise routine that ive changed so its definitely works well as a part of a balanced diet. Very smooth, dissolves easily and doesn't leave a milky taste. Vanilla is definitely my favorite and goes with everything - unfortunately it was out of stock so had to try the chocolate, took a while to get used to the taste but otherwise great as well. Definitely recommend.
  • 5/5

    9/10 Chocolate Bliss

    Really clean tasting shake. Not too sweet, the chocolate is more of a creamy icecream flavour rather than a rich style chocolate taste. Sits on my tummy well and has definitely boosted my weight loss while maintaining my muscle mass already after one week of daily shakes
  • 5/5

    10/10 Chocolate Bliss

    The product is so go good and doing it's work. The flavor is really good too. 100% worth to give a try.
  • 5/5

    10/10 Rich Vanilla

    My favourite isolate for the last 5 years
  • 4.5/5

    10/10 Chocolate Bliss

    Premium quality products. Highly recommend
  • 5/5

    10/10 Chocolate Bliss

    LOVE!! Highly recommend, doesn't have a strong protein taste like some protein powders
  • 5/5

    10/10 Chocolate Bliss

    it is awesome as always and the delivery time during covid was on point too, I will continue to buy this product and recommend others to use this.
  • 5/5

    10/10 Chocolate Bliss

    10/10 Chocolate Bliss

    Great product - easy to digest and tastes great - not too sweet. I take with a few blocks of ice, filtered water and a banana to bulk the drink. Now my teenage sons like it so need to get the bigger product size!
  • 5/5

    10/10 Rich Vanilla

    Delivery was 24hrs…so fast. A great protein powder, still our family favourite. The ON pre-workout is quite good too, another favourite.

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