Figure 6.

(A) Effects of different concentrations of zeaxanthin in liposomes on phototoxicity to ARPE-19 cells not supplemented with antioxidants, supplemented with zeaxanthin, or supplemented with a combination of α-tocopherol with zeaxanthin (Zea + TOH). (B) Effects of different concentrations of α-tocopherol (TOH) in liposomes on phototoxicity to ARPE-19 cells not supplemented with antioxidants, supplemented with α-tocopherol or supplemented with a combination of α-tocopherol with zeaxanthin (Zea + TOH). (C) Effects on phototoxicity of different combinations of zeaxanthin and α-tocopherol in liposomes to ARPE-19 cells supplemented with α-tocopherol and zeaxanthin. (D) The data are the same as in Figure 6C plotted as a function of α-tocopherol concentration. The symbols represent the viability of cells in independent experiments, the crosses represent the means, while the error bars show SDs (the individual data points from experiments with no antioxidants in liposomes are shown only in Figure 3; N for each experiment with antioxidants in liposomes was 8). Other experimental conditions as in Figure 3.