a1 Department of Nutrition, University of Otago, Dunedin, New Zealand
1. A relationship was found between selenium concentrations and glutathione peroxidase (EC 220.127.116.11) activities in whole blood of 264 New Zealand residents (r 0.71, P < 0.001).
2. New Zealand residents returning from visits overseas of 7 months to 3 years had elevated blood Se, but normal GSH-Px activities, whereas for some new settlers in New Zealand both Se and GSH-Px activities were high.
(Received January 05 1977)
(Accepted January 21 1977)