Ingredient

Contain Phenylalanine

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Source
Unknown
Not yet classified by editors
Allergen
No
Role in food
Phenylalanine is primarily used as a component in the artificial sweetener aspartame. Aspartame is …

What it is

Phenylalanine is one of the essential amino acids, meaning the body needs it but cannot make it. It is found naturally in protein-rich foods like meat, fish, eggs, and dairy. It is also used as a building block in the production of artificial sweeteners like aspartame.

Why it's used

Phenylalanine is primarily used as a component in the artificial sweetener aspartame. Aspartame is used to sweeten a variety of low-calorie or sugar-free foods and beverages, including diet sodas, sugar-free candies, and some yogurts.

Health notes

Phenylalanine is an essential amino acid and is generally recognized as safe (GRAS) by the FDA when consumed as part of food. However, individuals with the genetic disorder phenylketonuria (PKU) cannot metabolize phenylalanine properly and must avoid it. Foods containing aspartame are required to carry a warning label for individuals with PKU. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated phenylalanine and aspartame.

Allergen info

Phenylalanine is not one of the 9 FDA major allergens. It does not contain gluten.

Products containing Contain Phenylalanine

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Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.