Bulk Complete Mass Gainer | Vanilla | 2.5Kg | 45G Protein per Serving | 65G Carbohydrates | 500 Kcal per Serving | High-Calorie Weight Gainer | Supports Muscle Growth & Maintenance | High Protein. Bulk most popular weight gainer formula designed for serious bulking, containing over 500 kcal per serving including 66 g of carbohydrate and 40 g of protein from slow and fast release sources.