NutraBio Extreme Mass is the clean, high-calorie fuel for athletes serious about size, recovery, and strength. With 650 calories, 53 g of protein, and 100 g of carbs per full serving, it’s precision-built to drive lean mass and performance without unnecessary fat or filler. Each serving delivers fast and slow-digesting protein from Whey Protein Concentrate and Micellar Casein for sustained amino release. Carbohydrates come from a balanced matrix of maltodextrin, Fibersol®-2, and MCTs — fueling recovery while supporting gut health and energy stability. Fortified with a full-spectrum vitamin and mineral profile, Extreme Mass provides complete nutritional support for muscle repair and performance recovery. This is not just a mass gainer — it’s nutrient-dense performance fuel built for athletes pushing their limits.