Tyrosine and phenylalanine serve as metabolic precursors in the direction of the synthesis of mescaline. Tyrosine can either bear a decarboxylation via tyrosine decarboxylase to generate tyramine and subsequently go through an oxidation at carbon 3 by a monophenol hydroxylase or first be hydroxylated by tyrosine hydroxylase to kind L-DOPA https://www.buypeyoteonline.com/product/scopulicola-peyote/