Source Naturals Free Form L-Phenylalanine, 500 mg

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Sold as “Source Naturals Free Form L-Phenylalanine, 500 mg - 50 Tablets”

l-Phenylalanine, an essential amino acid, is a precursor of the amino acid tyrosine and a whole series of neurotransmitters and hormones. Phenylalanine is first converted to tyrosine, which becomes l-dopa, which converts to norepinephrine, a key neurotransmitter and an adrenal hormone. l-Phenylalanine is also a direct precursor of PEA (phenylethylamine), another important neurotransmitter.*