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. 2017 Aug 16;106(4):1041–1051. doi: 10.3945/ajcn.117.153635

FIGURE 4.

FIGURE 4

Nonlinear dose-response relation between 0 and 32 g soybean oil in salad dressing and the absorption of α-tocopherol, total tocopherol, β-carotene, and lutein from salad vegetables in healthy young women (n = 12). AUC 0–9.5-h values for contents in the plasma chylomicron fraction were used as indicators of absorption. Solid lines show the AUC data for individual subjects. The 0–32 g soybean oil dose response for these carotenoids and fat-soluble vitamins did not fit a linear mixed-effects random coefficient model as indicated by significant ANOVA lack-of-fit tests, P < 0.04. Insets show the linear dose-response relation for a limited range of added soybean oil when analyzed with the use of a linear mixed-effects random coefficient model. Solid lines show the predicted dose responses for individual subjects. Dotted lines indicate the group-average prediction model. The models shown were linear as indicated by P > 0.10 in the ANOVA lack-of-fit tests.