Skip to Content
Phenylalanine is one of the eight essential amino acids necessary
for the basic functioning of human cells that leads to normal growth and
development. It is found in most foods, especially those high in protein, such
as meat, cheese, and milk.
Food labeling laws require products that contain phenylalanine to
be labeled with a warning for people who have the inherited disorder
phenylketonuria (PKU), because these people cannot safely consume phenylalanine. For
example, aspartame, a common sweetener, is a nonprotein source of
phenylalanine. Aspartame is used in many diet soda pops and sugar-free foods.
Current as of:
July 26, 2016
John Pope, MD - Pediatrics & Kathleen Romito, MD - Family Medicine & Chuck Norlin, MD - Pediatrics
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
© Copyright 2017 Rush Copley Medical Center • 2000 Ogden Avenue; Aurora, IL 60504
Main: 630-978-6200 • Physician Referral & Information: 630-978-6700 or 866-4COPLEY (866-426-7539)