Fount answer to my own question

[Guest guest]

This statement is taken from the Needs Catalogue, which is supplied to them

by Allergy Research Group. " L-phenylalanine, the naturally occurring form

of phenylalanine, is converted in the body to L-tyrosine. D phenylalanine,

is metabolized to phenylethylamine, as an amphetamine-like compound that

occurs normally in the human brain and has been shown to have mood elevating

effects.......In another place " It is believed to function as a

neurotransmitter or brain chemical. It has pharmacological properties

similar to those of amphetamine, which has positive effects on people with

ADHD and depression.

Shirley