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Free ON water bottle when you purchase any GS Isolate 5lb (76serves)
Free ON water bottle when you purchase any GS Isolate 5lb (76serves)

Optimum Nutrition Gold Standard 100% Isolate

By Optimum Nutrition

Optimum Nutrition Gold Standard 100% Isolate Optimum Nutrition Gold Standard 100% Isolate Optimum Nutrition 5.0 5 3 50.58

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(standard $53.95)

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Buy a 2nd for $45.52

Standard Price


Buy a 2nd for $48.56

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Ships free!

(standard $53.95)

Club Z Price

+ FREE Shipping!

Buy a 2nd for $45.52

Standard Price


Buy a 2nd for $48.56


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Amino Z Micronised Creatine Monohydrate Powder 1kg

Add Amino Z Micronised Creatine Monohydrate Powder 1kg & save $11 (normally $24.95). No further discounts apply.

Total: $78.90
Bundle Discount: -$11
Together: $67.90




To create GOLD STANDARD 100% ISOLATE, we start 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. We put in the hard work to assure super quality, so you can focus on achieving ambitious performance goals.

• Hydrolyzed & Ultra-Filtered Whey Protein Isolate
• 1 Gram of Carbs Per Serving
• At Least 80% Protein Per Serving
• Delicious Taste in 6 to 8 Fl. Oz. of 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


Get maximum results with minimal ingredients. Using a series of sophisticated separation processes, excess fat, cholesterol, sugars, and other materials are removed so that simply 0 grams of total fat and 1 gram of carbohydrates remain. The result is a delicious, ultra-pure hydrolyzed whey protein isolate designed to get into your body rapidly, so your muscles can rebuild.

Total Serves per Package: 76

Serving Size: 1 Scoop (31g)

Per 31g ServePer 100g
Energy465.6 kJ1502 kJ
Protein25.1 g81 g
Carbohydrate0.9 g3 g
Sugar0 g0 g
Fat0.6 g2 g
Saturated Fat0 g0 g
Sodium190 mg613 mg

Hydrolyzed Whey Protein Isolate, Whey Protein Isolate (Emulsifier: Soy Lecithin), Cocoa (Processed with Alkali), Flavours, Salt, Sweetener (955).

Other Ingredients/Information

NOTE: The Nutritional Information & Ingredients is for Chocolate flavour. These may slightly vary depending on different flavours.

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Optimum Nutrition Gold Standard 100% Isolate Reviews

Average Rating:  

5 from 3 ratings
  • 5 Stars
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  • 1 Stars


By Jessica reviewed on 9/05/2019
Great flavour, I got the extreme milk chocolate
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Fantastic product from AminoZ

By Lisa reviewed on 6/04/2019

Verified buyerA verified buyer is someone who has purchased this product from Amino Z

Thanks to AminoZ, I was able to get a hold of this product quickly after it was released to the market. It’s a great quality protein powder, that not only tastes good, but isn’t filled with any additional stuff you don’t need.
I highly recommend this powder! 5 stars.
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100 Day Returns

100 Day Returns!

• Easy and hassle free
• You can return both opened and unopened product (see below for details)

For up to 100 days from the day that you place your order, you can take advantage of our returns, even if you just change your mind!

Please note, this policy does not relate to items that are damaged in transit, lost or incur an issue beyond your control. In situations like these, we will either refund, credit or send a replacement to you without delay. Our 100 day returns is for your peace of mind if you don't like the product, or simply change your mind.

For any unopened product, just ship the item back and we will refund or replace that item! You can obtain a refund, store credit or product exchange to the same value. Just let us know within 100 days from the date of your order.

For any opened product (Club Z members only), we understand that trying new supplements sometimes carries some uncertainty. Perhaps you’re not sure about a new flavour, or you just bought the wrong product. So if you're not happy with your purchase within 5 scoops (or 5 serves) and 30 days from the date of purchase, you can send it back for a full money-back guarantee! The purchase must have been made when you had an active Club Z membership.

Please note that if your item was purchased as an advertised discounted shortdated item, the above time frames are limited to 14 days. Shortdated items are heavily discounted items due to a sooner expiry date.

If however there was any issue in receiving your order (for example, if your order was lost or damaged in transit) - don't stress! Just contact us and we'll fix things up for you.

Simply contact us by email, phone, chat or visit us in-store to arrange a return. Our returns policy is subject to our standard terms and conditions.

Other Returns

Whenever a problem is incurred that is not your fault, we will be happy to arrange return shipping (if applicable) and the shipment of any replacement goods to you to avoid any further cost and inconvenience. All you need to do is contact us so we can jump on it as quickly as possible.

Here's what we will do in certain situations:

- Your item has been damaged/lost in transit (we'll replace it)
- Incorrect goods received (although rare, we'll ship off the correct item)
- A problem with the actual product or anything else (we'll do what is necessary to fix things for you!)

So we can fix things quickly for you, please let us know of any issues within 48 hours of receiving your goods. In certain situations we may ask for a photograph (for example if the product is damaged in transit, so we can take it up with the delivery company to avoid future issues).

If you do receive an incorrect product, please do not open the actual product so we can arrange a resolution quickly.

In a nutshell, we work really hard on keeping you happy. So if a problem arises, just contact us and we'll do our very best to fix it!

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