About Phenylalanine
The amino acid phenylalanine is the precursor to tyrosine and has been used in numerous studies to successfully treat depression.
DL-PHENYLALANINE
This is a combination of L-phenylalanine, an essential amino acid, and D-phenylalanine, a nonnutrient amino acid that helps promote the production of endorphins, natural painkillers made in the brain.
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