Source Naturals L-Phenylalanine 500mg， An Essential Amino Acid， 100 Tablets[Product Information]- An essential amino acid
- A precursor of the amino acid tyrosine and to a whole series of neurotransmitters and hormones
- Phenylalanine is first converted to tyrosine， which becomes L-dopa， which then converts to norepinephrine， a key neurotransmitter and adrenal hormone
- Also a direct precursor to PEA (Phenylethylamine)， another important neurotransmitter
- Available in 500 mg tablets and powder form
