Factors affecting bioavailability and bioconversion of provitamin A carotenoids
The wide CIs of the estimated apparent conversion factors clearly illustrated that the bioavailability and bioconversion of provitamin A carotenoids are influenced by many factors (31) and also vary widely among individuals. From the results of the present and our previous study (5), it seems that the most important factors affecting bioavailability and bioconversion are the food matrix, parasitic infestation, and dietary fiber, which can inhibit absorption (27, 28). The food matrix and parasitic infestation may act independently as well as in combination with each other. Fat is essential for carotene absorption, but because the fat content was maximized in both studies, it cannot explain the fact that the apparent vitamin A activity found for fruit and vegetables in these 2 studies was lower than the activity assumed on the basis of currently recommended conversion factors for calculating retinol equivalents.
Factors affecting bioavailability and bioconversion of provitamin A carotenoidsThe wide CIs of the estimated apparent conversion factors clearly illustrated that the bioavailability and bioconversion of provitamin A carotenoids are influenced by many factors (31) and also vary widely among individuals. From the results of the present and our previous study (5), it seems that the most important factors affecting bioavailability and bioconversion are the food matrix, parasitic infestation, and dietary fiber, which can inhibit absorption (27, 28). The food matrix and parasitic infestation may act independently as well as in combination with each other. Fat is essential for carotene absorption, but because the fat content was maximized in both studies, it cannot explain the fact that the apparent vitamin A activity found for fruit and vegetables in these 2 studies was lower than the activity assumed on the basis of currently recommended conversion factors for calculating retinol equivalents.
การแปล กรุณารอสักครู่..