2.4. Procedure
Phase 1. Baseline urine and plasma samples were obtained before the administration of the Phase 2. Six months following Phase 1, baseline urine samples were collected from the same group of eight healthy adults who participated in Phase 1. Prior to receiving three different Zn complexes, participants were randomly allocated to three groups: two groups of three subjects and one group of two subjects. Each group underwent a rotating schedule of single oral administrations, including 