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Free delivery on orders over $50 + same day dispatch for orders before 3.30pm
Free delivery on orders over $50 + same day dispatch for orders before 3.30pm


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Original price $79.95 - Original price $79.95
Original price
$79.95 - $79.95
Current price $79.95

Optimum Nutrition's Gold Standard Casein Protein is for right after training, you want a fast-acting whey protein to kick-start the recovery process.  But between meals and especially right before bed, a slowly digesting micellar casein shake can provide longer lasting muscle rebuilding support.  That's important, since the majority of muscle rebuilding takes place at night while you're asleep.

Optimum Nutrition's Gold Standard Casein was the industry's first all-micellar casein protein and it's been America's best-selling casein for many years. Casein proteins are pH sensitive and gel in the acidic environment of the stomach. As a result, it can take more than twice as long for caseins to be broken-down into their amino acid subcomponents than whey and other proteins. Because of their unique time-released qualities, caseins are aptly described as anti-catabolic or muscle-protecting proteins.  Micella Casein is the slowest digesting form of casein.  It is seperated from milk through an ultrafilteration process.  One of Micellar Casein's unqiue properties is its ability to gel during digestion so it can release a steady flow of amino acids over several hours.

Optimum Nutrition Casein Protein Powder features:

  • 24 grams of micellar casein instantised blend of slow digesting casein based proteins
  • Support muscle growth and anti-catabolic prevents muscle wasting
  • Perfect slow release and slow digesting protein formula
  • Muscle building and fast recovery

Optimum Nutrition Casein Protein Powder contains:

  • Rich in highly anti-catabolic micellar casein
  • Over 10 grams of BCAAs, glutamine and glutamine precursors per scoop
  • Aminogen enhanced
  • 24g micellar casein per serve

The formula is instantised to mix easily, and contains patented digestive enzymes to help your body better utilize the 10 grams of essential amino acids provided in each serving. You'll find that casein mixes up rich and creamy like an ice cream shake.

The remaining 80% of the protein in milk is casein.  Often referred to as a “slower acting” or “time released” protein because it is digested and absorbed much more slowly than other proteins, casein proteins are especially useful when taken at bedtime and during other prolonged periods without eating.  Casein proteins are especially useful when taken at bedtime or between meals, so that amino acids can be delivered to muscles for a longer period of time.  It takes longer to digest and empty from the stomach compared to other proteins. 

All orders placed before 3:30pm are packed same day and shipped to arrive typically the next working day. Please allow an extra 1-3 working days for driver delays. We reserve the right to reject any order addressed to a PO box or a Parcel Pod.

All orders over $50 within New Zealand include free shipping. For orders under $50, a flat rate of $3.99 is charged.

Rural - $4.99 surcharge applies. We suggest to send to a town or workplace that is not a rural delivery address.

Bay Supplements uses NZPost within New Zealand.

If you have changed your mind after the courier has picked up your order, then you must organise for the return of the products for a refund. The goods must be returned to Bay Supplements within 7 days of the goods being received, and in an unused and unopened condition. Unless the goods are faulty, the products will not be refunded or replaced if they are used and or opened. Return shipping for faulty goods will be covered by Bay Supplements. Return shipping for non-faulty goods will be covered by the customer.

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