• Supports muscle recovery
• 24g of protein & 9g EAAs per serving
• Slow-digesting
• Chocolate Supreme flavor

Fuel your goals even as you sleep with GOLD STANDARD^® 100% CASEIN™ by Optimum Nutrition. This slow-digesting formula delivers 24g of premium micellar casein, plus 9g of EAAs to refuel recovering muscles when your body goes for hours without food—like at bedtime.

Frequently Asked Questions

What is micellar casein protein?

Micellar casein is a milk protein that is digested more slowly than other proteins, providing an extended release of muscle-building amino acids that help prevent catabolism.

What is catabolism?  

Catabolism is the breakdown of protein. When your body goes for extended periods without food, or when it’s under significant metabolic stress during exercise, it can resort to catabolizing your muscles for energy.

• 27 Ultra Pure Servings
• 24g Muscle Targeted Protein
• 0 Amino Fillers

Formulated From Science

• Targeted Whey/Casein Blend
• Ultra-Pure Milk Protein Isolate
• Premium WPC-80
• LEU PepForm - Leucine Peptides

Do You Just Whey?

If you're a regular whey protein user, there's something you need to know. When it comes to optimally building lean muscle, just whey protein is NOT ENOUGH. Nature had it right. When researchers tested a combination of whey protein + casein protein, as found naturally in milk protein, they discovered that the two protein sources work together in a synergistic manner to build lean muscle.

100% Whey protein in isolation only gets you so far... it can spike protein synthesis with an influx of amino acids, but quickly returns to baseline, leaving you where you started.

Enter casein, a slower-digesting protein that's typically consumed for its anti-catabolic properties as it promotes a steady release of amino acids over time.

In another published study, researchers found the combination of whey protein with casein protein resulted in a quick increase in protein synthesis along with a sustained elevation in plasma leucine levels. Plasma leucine levels are a key dictator of muscle protein synthesis, and thus, a combination of whey protein and casein protein may serve to maximize muscle protein accumulation.

This is the exact, real, validated science SELECT PROTEIN™ is formulated from...a combination of the highest quality Milk Protein Isolate and Whey Protein Concentrate 80%.

• 24g of protein, 0.5g of fat, and 1g of sugar per serving
• Slow release
• Anti-catabolic protein
• Rich Chocolate flavor