Phenylalanine is an amino acid which are the building blocks of proteins in your body.
It has 2 different forms, L-phenylalanine and D-phenylalanine.
L-phenylalanine can be found in mother’s milk and a number of foods such as meat, poultry, fish, cottage cheese, lentils, peanuts, and sesame seeds. 
D-phenylalanine can be synthesized by the pharmaceutical company for general health use.
Supplementation with phenylalanine has been presumed to have antidepressant effects or help to support for a better mood.

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