• 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%.

• Protein Blend
• Infused Probiotics
• Digestive Enzymes
• Made Without Soy Or Gluten

• Helps build and maintain muscle
• Supports endurance and recovery
• Instantized powder for easy mixing
• Vanilla Ice Cream flavor

GOLD STANDARD 100% WHEY by Optimum Nutrition fuels your body with 24g of high-quality whey protein derived primarily from whey protein isolate, plus 5.5g of naturally occurring BCAAs to support muscle building, maintenance, endurance, and recovery.

Frequently Asked Questions

What is whey protein isolate?

Whey protein isolate (WPI) has the highest concentration of protein and BCAAs, while having less carbs, cholesterol, and fat compared to other whey proteins. WPI is also low in lactose and easy on your digestive tract.

What are BCAAs?

Branched-chain amino acids (BCAAs) include leucine, isoleucine, and valine. They support muscle growth and reduce muscle fatigue.