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Optimum Nutrition
Gold Standard 100% Casein

Category: Casein Protein

Our Price £29.95

Optimum Nutrition Gold Standard 100% Casein

Isolate proteins are desirable immediately before and after exercise to support muscle growth and maintenance, however casein proteins 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. Casein is best utilized before bedtime to help maintain muscle mass while your body is in a fasted state. 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 & 3.5 Grams of Carbohydrates per Serving
  • Ideal for Use Between Meals and Before Bed


Micellar Casein is one of the highest quality forms 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.

Nutrition Information
Serving Size: 1 Scoop (33g)
Servings per Container: 14 (450g) / 28 (908kg) / 55 (1.8kg)
Amount Per Serving %DV
Energy 477 kJ
114 kcal
Protein 24.4 g *
Total Carbohydrates 3.0 g *
   Of Which Sugars 1.5 g *
Total Fat 0.5 g *
   Of Which Saturates 0.2 g *
   Of Which Trans Fat 0 g *
Dietary Fiber 0.4 g *
Sodium 242 mg *
*Percent Daily Values are based on a 2,000 or 2,500 calorie diet. Your daily values may be higher or lower depending on your calorie needs. † Daily Value not established.

Ingredients: Micellar Casein (MILK)[contains Emulsifier (SOY Lecithin)], Flavour, Salt, Thickeners (Cellulose Gum, Carageenan Gum, Guar Gum), Masking Agent (contains Dextrin, Flavourings), Sweetener (Sucralose, Acesulfame Potassium), Colour (Curcumin), Enzyme Complex (Amylase, Protease, Cellulase, Beta-D-Galactosidase, Lipase).

Directions: Using a shaker cup is the easiest and most convenient way to mix up a consistently great casein shake every time. Just add one heaping scoop of Gold Standard 100% Casein to a shaker cup filled with 300-350 ml of your preferred beverage. Cover and shake for 25-30 seconds.

Allergen Information: Contains Milk and Soy. 

Please Note: Nutritional facts and ingredients may vary slightly between flavours.

Optimum Nutrition Gold Standard 100% Casein

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