
Rule1 Mass Gainer is a high-calorie supplement designed for athletes and bodybuilders who want to increase muscle mass and size. It provides over 1,000 calories per serving, with 40 g of all-whey protein to support muscle growth and repair. The complex carb blend, which includes organic rice bran and Carb 1, provides 200+ g of carbohydrates to support energy levels during intense workouts.