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Optimum Nutrition Gold Standard Casein

Optimum Nutrition Gold Standard Casein

Regular price $74.90
Regular price $79.95 Sale price $74.90
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About Gold Standard Casein

Gold Standard Casein is a premium slow-digesting protein supplement that provides crucial support for muscle recovery. This high-quality protein powder is a must-have after workouts or between meals, especially before bedtime when your body needs fuel to recover for hours without food.

Micellar Casein Protein for Anti-Catabolic Support

Optimum Nutrition's Gold Standard Casein features 24g of micellar casein protein per serving, a high-quality protein source known for its anti-catabolic properties. This means it helps protect your muscles from breakdown and supports their recovery after strenuous workouts.

Naturally Occurring BCAAs, Glutamine and Glutamic Acid

Each scoop of Gold Standard Casein contains nearly 5 grams of naturally occurring BCAAs, which are essential amino acids that support muscle growth and recovery. It also contains nearly 5 grams of naturally occurring glutamine and glutamic acid, two more important amino acids for muscle repair and overall health.

Delicious Flavors for an Enjoyable Experience

Gold Standard Casein comes in a range of delicious flavours to suit your taste preferences, including chocolate banana, cookies and cream, choc peanut butter, and vanilla. Enjoy a protein-packed, tasty treat that supports your fitness goals.

How to Use Gold Standard Casein

Consume one (1) serving of Gold Standard Casein mixed with 300ml of water between meals or before bedtime.


For orders over $95, we offer FREE postage Australia wide
For orders below $95, the regular postage fee Australia wide is $10
For orders below $95, the express postage fee Australia wide is $14.95


We aim to dispatch all orders within 1-2 days. Once your order is dispatched, you will get an email with a tracking number with a clickable link. Alternatively, you can simply visit AusPost and enter your tracking number.

If your delivery seems to be taking longer than expected, please email us at, and we would be happy to follow it up for you!

We have a 30 Day refund/ return policy. However, please find our full list of terms and conditions here.


Have a full read of our shipping policy here or reach out to us directly.
You can email or buzz us on 02 6290 6635.
Happy shopping Oxygen crew!