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Optimum Nutrition

Optimum Nutrition 100% Natural Casein Protein


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Casein, a slower digesting and absorbing protein, compared to whey, may be used after exercise, between meals, or before bed to help support satiety and muscle recovery. GOLD STANDARD 100% CASEIN can deliver BCAAs to recovering muscles for several hours. By using only premium micellar casein with our high standards and no artificial flavors, sweeteners or colors as a protein source, we've created a protein powder that sets the GOLD STANDARD for slow digesting protein support.

  • 24 Grams of Protein Per Serving Helps Build & Maintain Muscle3
  • 4.9 Grams of Naturally Occurring BCAAs to Support Recovery
  • 4.8 Grams of Naturally Occurring Glutamic Acid
  • Ideal for Use Between Meals or Before Bed
  • No Artificial Flavors, Sweeteners or Colors
  • Banned Substance Tested
  • 40% of the Daily Value for Calcium
  • 130 Calories per Serving
  • 0.5 - 1 Gram of Fat Per Serving


Mix a scoop of the powder into 8 to 14 fluid ounces of cold water or milk using a shaker cup. For best results, mix up your shake 30 to 60 minutes after your workout, before bed, or use as an anytime snack. 

For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a balanced diet and exercise program.