Optimum Nutrition Gold Standard Natural 100% Casein


Optimum Nutrition Natural 100% Casein is free of artificial flavors, sweeteners, and synthetic colors and uses only premium micellar caseins to create a protein that is truly time-released. Optimum Nutrition Natural 100% Casein contains 24 grams of protein per scoop


Optimum's Gold Standard Natural 100% Casein is a natural slow-digesting anti-catabolic micellar protein that gives you the edge you need to surpass your fitness goals. Though fast protein use is desirable immediately before and after exercise to reinvigorate tired muscles, all other times it's delayed digestion and absorption that your body draws its strength from.

Gold Standard Natural 100% Casein Features:

  • Zero artificial flavors, sweeteners or synthetic colors
  • Tons of micellar casein
  • 24 grams of time-released protein per serving
  • Nearly 5 grams of BCAAs (leucine, isoleucine, and valine)
  • Nearly 5 grams of glutamine precursors in every scoop
  • Contains aminogen digestive enzymes to enhance the utilization


Casein proteins are known to thicken once in the stomach, which means that it can take more than twice as long for Optimum's Gold Standard Natural 100% Casein to break down into its amino acid subcomponents. This revolutionary product also uses only premium micellar caseins to create a time-released protein, setting itself apart from all the other similar products on the market.

3rd Party Tested

This product advertises that it has been 3rd party tested by Informed Choice or Informed Sport. This means that this product has been tested for a broad range of substances that are banned in sports or competitions and within the limitations of the analysis no banned substances were found.

Nutrition Facts

49 servings per container
Serving size
1 Scoop (36.5g)
Amount per serving
Amount Per Serving
% Daily Value
Total Fat
Saturated Fat
Trans Fat
Total Carbohydrate
Dietary Fiber
Total Sugars
Vitamin A
Vitamin C

Percent Daily Values are based on a 2,000 calorie diet. Your Daily Values may be higher or lower depending on your calorie needs.

Ingredients: Micellar Casein, Natural Flavors, Honey Powder, Inulin, Evaporated Cane Juice, Lecithin, Salt, Cellulose Gum, Reb A (Natural Stevia Leaf Sweetener).

Allergen Information: Contains Milk and Soy (Lecithin) Ingredients.

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Add one rounded scoop of 100% Casien Protein to 10-12 oz of water, milk, or your favorite beverage.


Do not use as a sole source of nutrition for weight loss or maintenance. Keep out of reach of children. Check with a qualified healthcare professional before taking this product if you are pregnant, nursing a baby, or under 18 years of age.

Additional information

Weight 35.2 oz
Dimensions 10 × 6 × 6 in