The big z from the protein works is a great tasting high protein hot chocolate malted drink it is the ideal bedtime drink packed full of nutrients sourced from premium grade micellar casein and whey protein concentrate in addition it contains our own night time amino acid blend specifically designed for the big z as with all tpw products the big z is uncompromising in the quality and list of ingredients used in its formulation nutritionally designed to fit all diets one mug of the big z