New protein powders could make PKU diet easier and tastier

This study is testing four new powdered protein substitutes for people with PKU or tyrosinemia, rare conditions that require a special diet. The products are made from a milk protein called GMP and are designed to be more palatable and easier to stick with than current options. About 40 adults and children over age 3 will try one of the products for 28 days, and researchers will track how well they tolerate it, how much they like it, and any side effects.