phenylalanine
An essential amino acid occurring in proteins. A small amount of phenylalanine is necessary in the diet to make the proteins that form human tissues.
Last Updated
October 7, 2025
October 7, 2025
Last updated: October 7, 2025.
Explore More
Signs and symptoms of COPD exacerbations
If you’ve been diagnosed with chronic obstructive pulmonary disease (COPD), it’s important to know about COPD exacerbations. These events are potentially serious and even life threatening. Learn ho...