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Source Naturals Free Form L-Phenylalanine Description

• An Essential Amino Acid
• Suitable for Vegetarians
• Hypoallergenic

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.

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