The mean plasma lutein concentrations and MPOD values in the lutein and control groups , respectively , were 91.5 and 78.2 ng/mL and 0.444 and 0.437 DU at baseline ; 204.9 and 79.3 ng/mL and 0.460 and 0.442 DU at 1 month ; and 228.0 and 78.4 ng/mL and 0.441 and 0.421 DU at 4 months .