Skip to main content
Optimum Nutrition

ON Optimum 100 Casein


FitCoin Value: 140


Optimum Nutrition Gold Standard 100% Casein 

Slow down the rate of protein digestion – not your performance! Gold Standard 100% Casein by Optimum Nutrition contains – as the name suggests – 100% of the dairy protein Casein to help with recovery, boost muscle growth and reduce muscle breakdown while you sleep. This slow-digesting protein releases amino acids slowly over a long period of time. This process can help your cells synthesize protein during times when your body might normally be breaking down its own muscles to energise itself. While athletes and bodybuilders use fast-digesting protein immediately before and after their workout to help refuel recovering muscles, slow-digestion is more beneficial at other times including bedtime when your body typically goes for hours without food.

  • Slow-release protein.
  • 24g of anti-catabolic micellar casein per serve.
  • Over 4g BCAAs per serve.
  • Over 5g glutamine & glutamic acid per serve.

Optimum Nutrition Gold Standard 100% Casein is “anti-catabolic” and helps reduce muscle breakdown, making it the perfect slow-release protein to add to your supplement stack. It is also rich in antioxidants and prohibits the rise of dangerous free radicals. Optimum Nutrition Gold Standard 100% Casein contains essential and non-essential amino acids, as well as the BCAAs L-Leucine, L-Valine and L-Isoleucine plus 5g Glutamine & Glutamic Acid per serving for optimal regeneration of damaged cells and recovery.

Weight2100 g



Chocolate, Vanilla



Our delivery partners are currently experiencing delays when shipping to Western Australia, please allow for extra time when receiving your product.

Contact Us if you have any issues regarding your order.


Free Click and Collect – Highpoint Shopping Centre (VIC)

FREE Shipping Over $100

Under 0.5kg – $8.95

Flat Rate Shipping Under $100 – $9.95


If you do have a right of cancellation, you must tell us you wish to cancel within seven days of receiving the products.

The products must be returned to us within 28 days of receiving them: – in their original condition (both products and packaging); securely wrapped; together with our delivery slip; and at your own risk and cost.

When we have received the products, we will credit your credit card or debit card with the purchase price of the products no later than 30 days from the date the products are received by us.


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

  • No products in the cart.