TYR express plus is a powdered formula with no phenylalanine or tyrosine; it's for use in the dietary management of tyrosinemia and is a blend of essential and nonessential amino acids, carbohydrate, docosahexaenoic acid (DHA), vitamins and minerals.. Convenient, pre-measured packaging means there's no weighing or measuring needed; packets are easy to take on-the-go.. 20-gram protein equivalent packets can be mixed with 3 ounces of water or permitted beverage to prepare a low volume drink.. There are 30 packets of unflavored powder in a box..