OptiZinc® 30 mg, dietary supplement, Zinc Monomethionine complex.OptiZinc® is a patented 1:1 complex of zinc and methionine, the amino acid that is best absorbed by the body. Studies show that OptiZinc is absorbed better and retained longer than ordinary zinc supplements tested, and resists binding with dietary fiber and phytate, organic compounds thatinhibit zinc absorption.