Gold Standard 100% Casein Protein

Optimum Nutrition
Gold Standard 100% Casein Protein

Size :4lb
Servings :53-55 depending on flavor
SKU :ONCasein4lb

Availability: In stock

4.95 stars, based on 6 reviews
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Short description:

Ideal for Between Meals and Before Bed to Feed Muscles and Fuel Recovery


  Description    Directions    Ingredients    Reviews  

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Faster digesting amino acids are desirable immediately before and after exercise to help refuel recovering muscles, but slow digestion and absorption may be more beneficial at other times – including bedtime when your body typically goes for hours without food.

Casein proteins are acid sensitive and thicken in the stomach. Compared to some other proteins, it can take more than twice as long for Gold Standard 100% Casein to be broken down into its amino acid subcomponents. By using only premium micellar casein as a protein source, ON has created a formula that sets the standard for slow digesting protein support.


  • Best-Selling Micellar Casein
  • 75% Protein by Weight (24G of Protein per 32G Serving Size)
  • 24 Grams of Slow-Digesting Micellar Casein per Serving
  • Over 5 Grams of BCAAs (Leucine, Isoleucine and Valine) per Serving
  • Nearly 5 Grams of Glutamine & Glutamic Acid in Every Scoop
  • Very Low Levels of Fat, Sugar & Carbohydrates
  • Ideal for Use Between Meals and Before Bed

Micellar Casein is the slowest digesting form of casein. It is separated from milk through an ultrafiltration process. One of Micellar Casein’s unusual properties is its ability to gel during digestion so it can release a steady flow of amino acids over many hours.

Use first thing in the morning, immediately before bed, in place of small meals, and/or any other time when delayed protein absorption is desired. To encourage positive nitrogen blance, consume approximately 1 gram of protein per pound of body weight per day from a combination of high protein foods and supplements. For better results, consume your daily protein allotment over 4-6 meals spread evenly throughout the day.

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Customer Reviews

  • Justin
    Great product March 8, 2016

    Taste great and good price!

  • James
    great bang for the buck January 26, 2015

    this is a great casien when it comes to the price and ingredients. it just tastes a little powdery to me so i usually mix somethings with it. other than the powdery taste, i would recommend this along with any other ON product. their supps are cheap but excellent quality

  • Keith
    good quality August 25, 2014

    Tastes pretty good. I added a couple tablespoons of peanut butter to the chocolate, and it tasted amazing. Mixes well in a shaker cup.

  • Nimbus J
    Flavor isn't bad but won't buy again August 6, 2014

    I've tried other casein flavors from ON and would probably say this is my least favorite so far. It isn't bad, really its quite good, just not my favorite.

  • michael
    Casein February 18, 2014

    Good product, big fan of ON products

  • Adam
    Good product February 4, 2014

    Cheaper by weight than others and tastes great.

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