The Protein Works The Big Z is a delicious high protein hot chocolate malted drink. It is suitable for Vegetarians.It contains Micellar Casein and Whey Protein Concentrate which are designed to deliver slow absorbing high quality protein to the muscles as you sleep. Protein contributes to muscle growth and maintenance. Also included is an Amino Acid Blend with L-Ornithine, L-Glycine, L-Tryptophan, L-Theanine and Leucine. These work together with the protein ingredients to promote bioavailability.The product is low in fat and does not contain any fillers or thickeners.The Protein Works The Big Z is designed to be consumed at bedtime.