Interactive mammoth mass gainer is a delicious weight gain shake designed to help you pack on the pounds and fast if yoursquore what we call a ldquohard gainerrdquo then this is the perfect product for you due to the high amount of calories per serving r the mammoth mass gainer shake also delivers slow and fast carbohydrates with a low glycemic maltodextrin providing a whopping 230g of carbs per servingr mammoth mass gainer delivers an impressive 60g protein combining whey pro