of b-carotene. The upper and lower limits of the 95% CI for the apparent conversion factor (x) were estimated by using the limits of the 95% CIs for the changes in serum retinol concentration of the respective treatment groups
of b-carotene. The upper and lower limits of the 95% CI for theapparent conversion factor (x) were estimated by using the limitsof the 95% CIs for the changes in serum retinol concentrationof the respective treatment groups