• Helps build and maintain muscle
• Supports endurance and recovery
• Hydrolyzed & ultra-filtered whey protein isolate
• Fast-digesting
• Chocolate Bliss flavor

Support your muscle building, endurance, and recovery goals with GOLD STANDARD 100% ISOLATE by Optimum Nutrition. This Chocolate Bliss shake mix delivers 25g of the highest-quality hydrolyzed whey protein isolate—containing 0.5g of fat, only 1g of carbohydrates, and more than 80% of pure protein per serving.

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 is hydrolyzed whey protein isolate?

Hydrolyzed whey protein isolate (HWPI) is whey protein isolate that has been broken down into smaller chains of amino acids called peptides. Peptides are easier to digest, allowing for faster absorption into the bloodstream.

What are BCAAs?

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

• Supports muscle building and weight gain goals
• 1,250 calories, 50g of protein, and 252g of carbs per serving
• Delivers 25 vitamins & minerals, creatine, and glutamine
• Chocolate flavor

If you’re aspiring to be bigger, have a highly active metabolism, weaker appetite, or on-the-run lifestyle, SERIOUS MASS™ by Optimum Nutrition is for you. This Chocolate weight gain powder packs 1,250 calories, 50g of protein, and 252g of carbohydrates in every serving to help boost calorie intake, support muscle building, and fuel intense workouts.