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Phenylketonuria clinical trials recruiting in the U.S.

14 studies for Phenylketonuria are recruiting participants at sites across the United States.

In phenylketonuria (PKU), your body can't process phenylalanine, an amino acid in most foods. Read about genetics, screening, and special diets.

Cities with the most studies

• Dallas, TX7 studies
• Pittsburgh, PA6 studies
• Indianapolis, IN6 studies
• Portland, OR5 studies
• Chicago, IL5 studies
• Salt Lake City, UT4 studies
• Atlanta, GA4 studies
• Tampa, FL3 studies
• Boston, MA3 studies
• Nashville, TN3 studies
• Milwaukee, WI3 studies
• Aurora, CO3 studies

By state

• California4 studies
• Colorado3 studies
• Florida4 studies
• Georgia4 studies
• Illinois5 studies
• Indiana6 studies
• Massachusetts3 studies
• Oregon5 studies
• Pennsylvania8 studies
• Tennessee4 studies
• Texas7 studies
• Utah4 studies
• Wisconsin3 studies

Recently updated studies

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.