Limited Edition Optimum Nutrition Gold Standard 100% Whey X RCB Pack delivers 24g of premium whey protein per serving, powered by Whey Protein Isolate to support muscle recovery and growth. Each scoop provides 11g EAAs, 5.5g BCAAs, and over 4g Glutamine & Glutamic Acid. Gluten-free, vegetarian-friendly, and Informed Choice certified for banned-substance testing. Available in Double Rich Chocolate, 2 lb & 5 lb packs—trusted by athletes worldwide for over 35 years.