In some cases large amounts of tryptophan are obtained in the diet, and the level of night-time formula will need to be reduced. Consult your physician for signs of this condition. Tyrosine is the precursor for dopamine, epinephrine, norepinephrine, thyroxines and melanin. Proline is used in protein synthesis in general and in collagen synthesis, it can be hydroxylated at certain sites to provide for the final steps of manufacture of collagen. Serine is the skeleton source that is used in a variety of pathways, including the unfortunate overproduction of cysteine by the cystathionine beta synthase enzyme.
Taurine is an essential amino acid of unusual structure.
It is used in manufacture of bile salts and in other pathways. Interestingly, it is a metabolite of cysteine. DMAE is dimethyl amino ethanol. Choline is the appropriate supplement. It is an essential neurotransmitter and membrane component, is nontoxic, and is well tolerated.