100% Gold Standard Casein

Regular price $79.95 Sale price $59.95
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100% Gold Standard Casein by Optimum Nutrition

Gold Standard 100% Casein by Optimum Nutrition is a dairy based protein powder supplement. Casein protein is a common protein found in milk that is a slower digesting protein than the likes of whey. When consumed, this protein forms globules and insoluble curds in the stomach that are more difficult for enzymes to digest. Because of their slow digestion, casein proteins are great for staying full and provide a slow release of protein to prevent muscle breakdown.

Who is this product designed for?

This casein powder supplement is designed for anyone who wants to increase their protein intake, stay fuller for longer and maximise recovery. It’s a great supplement to take before bed to aid the growth and maintenance of muscle mass.

How Can this Product Help Me?

Want to maximise recovery? In order to repair and recover the body and muscles need enough protein available. During sleep, our body is recharging and recovering from the days activities, so consuming Casein Protein before bed is a great way to drip feed your body more protein in it's most important recovery phase! 
Need to stay fuller for longer? Casein milk proteins form insoluble curds in the stomach that take more time to digest. As a result, you can stay fuller for longer!
Want to increase your protein intake? In just 120 calories you’ll get 24g of high-quality protein with only 3g of carbs, 1g of sugar and 1g of fat.


  • Slow digesting for a sustained protein release
  • 24g of protein per serving 
  • Only 120 calories per serving
  • Contributes to the growth and maintenance of lean muscle mass
  • Contains a source of malic acid and trademarked Aminogen® blend

How to take

Mix 1 scoop with 400ml of water or milk for a thick and creamy shake. We recommend consuming this shake before bed for the best results.

Changed your mind? Return your products unopened and we'll provide an exchange or a refund!

Fit Nutrition will immediately replace or refund any broken, damaged or incorrect items. Our policy lasts 30 days and we’ll make sure we deal with any issues straight away!

Get in touch

Please note that we want all customers to be satisfied with their orders, however if you simply don't like the taste of something, give it to a friend who will, as we cannot refund for this reason.

At Fit Nutrition, our promise to you is to have orders dispatched and delivered as fast as possible, Australia wide.

Our shipping and handling fee is a flat $10 Australia wide or FREE DELIVERY if you spend over $100 per transaction.

Orders from our website www.fitnutrition.com.au  are dispatched daily by 2pm (excluding weekends and public holidays) and we aim to always offer prompt and timely service. We always try and get orders dispatched within 24-48 hours of purchase, however delivery is estimated 1-3 days in Metro Areas and 1-5 days in Rural Areas. Please note: during sale periods dispatch time is estimated but may take 1-3 days to be dispatched.

All orders are freighted via Couriers Please and are delivered right to your door, so please ensure you provide your street address. Fit Nutrition cannot be held responsible for deliveries when an incomplete or incorrect address is provided.

At Fit Nutrition we aim to ensure the accuracy of all products, images and information on our website. Occasionally manufacturing changes can be released to market before our updates can be made. If you receive a product that differs to the one online please reach out to our Customer Service team so we can follow up with the brand and ensure the update is made. No matter the product you receive we always recommend reading the ingredients and directions prior to use, even if you’ve had the product previously, to ensure you have the most up to date information.

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