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What Is Phenylalanine?

Phenylalanine is an essential amino acid. Phenylalanine is the starting compound used in the synthesis of flavonoids in plants.

Essential means that the body cannot synthesize it, and therefore must be ingested through our diet.

Phenylalanine Is Important

Phenylalanine is an essential amino acid in humans. Phenylalanine is important in the biosynthesis of other amino acids. It works with the structure and function of many proteins and enzymes. (source đź——)

Phenylalanine is highly concentrated in the brain and the plasma. (source đź——)

You can find benefits of phenylalanine in Phenylalanine: 4 Research-Backed Benefits .

Phenylalanine In Food

Phenylalanine is found in high concentrations in several high protein foods, meat, poultry, fish, cottage cheese, wheat germ, peanuts, and sesame seeds. Also found in breast milk. (source đź——)

If you are interested in a list of foods where you can find this nutrient. Go to our nutrition tool and check out phenylalanine.

Another common use of phenylalanine is artificial sweeteners containing aspartame. Aspartame should be avoided by pregnant women and people that have phenylketonuria. (source đź——)

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Sara Niemelä

co-founder Care Omnia, Head Content Creator


I’m a wife and a mother of three. I enjoy the outdoors, cooking, and spending time with my family. Nutrition is my passion. I have spent thousands upon thousands of hours reading, analyzing, categorizing and comparing research studies. Nutrition is the foundation you build a healthy and fulfilling life upon!