Dietary SupplementZinc Monomethionine with Vitamin B-6Lab Verified Discussion: Zinc helps support healthy immune and endocrine systems as well as skin and cellular function. OptiZinc® is a patented 1:1 Complex of zinc and methionine, an amino acid that is best absorbed by the body. Studies suggest that OptiZinc® is absorbed better and retained longer than ordinary zinc supplements tested, and resists binding with dietary fiber and phytate, organic compounds that inhibit zinc absorption.