Growth Factor Mass is the All-In-One mass gaining formula that is without equal. Containing 57g ofa quality mass gaining protein blend, together with 76g of a 5-stage carbohydrate matrix, Growth Factor Mass contains anunparalleled combination of the most intelligent and hard working sports nutrition ingredients available. Growth Factor Mass can help you build serious muscle mass, increase explosive strength and support muscle building testosterone levels. Growth Factor Mass is the All-In-One mass gaining formula that is without equal. Containing 57g ofa quality mass gaining protein blend, together with 76g of a 5-stage carbohydrate matrix, Growth Factor Mass contains anunparalleled combination of the most intelligent and hard working sports nutrition ingredients available. Growth Factor Mass can help you build serious muscle mass, increase explosive strength and support muscle building testosterone levels.