• Supports muscle mass and size
• Infused with Carb10^®
• No amino spiking
• Cookies and Cream flavor

Formulated, flavored, and trusted by 5x Mr. Olympia Chris Bumstead, CBUM Series Mass Gainer delivers the great-tasting fuel you need to support next-level muscle mass and size. This high-protein protein shake packs 53g of protein, 1,070 calories, and 2.5g of creatine monohydrate in every scoop.

Frequently Asked Questions

What is Carb10?

Carb10 is a low-glycemic source of carbohydrates including pea starch and lactase.

What is amino spiking?

Amino spiking is the practice of adding low-grade amino acids to a protein powder supplement.

Are protein shakes “good” for you?

Protein shakes can be an excellent addition to a well-rounded diet and healthy lifestyle. Research has shown that supplementing with protein can support athletic performance, post-workout recovery, muscle maintenance, and muscle growth.

Can protein shakes support weight gain?

Protein shakes may support weight gain if they contribute to a calorie surplus in your diet.

Are protein shakes "good" for women?

Supplementing with protein is as beneficial for women as it is for men in supporting muscle growth and maintenance, recovery, and performance.

How can protein supplements benefit my muscles?

Protein supplements provide the nutrients your body needs to stimulate muscle protein synthesis and support recovery post-workout.

Who Would Benefit from Taking Protein?

• Athletes and fitness enthusiasts looking to support muscle growth, muscle maintenance, performance, and post-workout recovery
• Older adults who require more protein to maintain muscle mass and overall health
• Busy professionals and students who need a quick and convenient source of protein on the go
• Anyone with increased protein needs, such as vegetarians or individuals practicing a low-carb diet

• Helps build and maintain muscle
• Supports endurance and recovery
• Instantized powder for easy mixing
• Double Rich Chocolate 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.

• 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.

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