25 euthyroid volunteers were divided into two groups. Each participant
of group A received 200 mu g iodine in the form of diiodotyrosine per
day for a period of eight weeks, i.e. 7 x 200 mu g iodine/week. Each
participant of group B received 1 500 mu g iodide once a week for a pe
riod of eight weeks. In addition to the basal excretion of iodine with
the collected urine, the excretion values in group A amounted to 67 %
of the applied dose in the eighth week. In group B, the excretion val
ues amounted to 65 % of the applied dose in the eighth week. Hence, no
significant difference between both groups was found.