BACKGROUND Conventional mixed models for the analysis of diet diary data have introduced several simplifying assumptions, such as that of a single standard deviation for within-person day-to-day variation which is common to all individuals. OBJECTIVE We developed a model in which the within-person standard deviation was allowed to differ from person to person. DESIGN The model was demonstra...

Eight ground beef patty formulations, based on replacing meat with a natural source rich in provitamin A (i.e.carrot and sweet potato) were prepared. All treatments displayed better moisture retention than the controls and hence yield was improved. L, a, and b Hunter values increased and Instron texture profile analysis indicated lower peak forces, increased springiness, and, in some cases cohe...

In a prospective study of about 22,000 men attending a well person screening centre, serum samples were collected and stored. The concentration of retinol was measured in the stored serum samples from 227 men subsequently notified as having cancer and from 454 unaffected controls, matched for age, smoking history and duration of storage of the serum samples. The mean serum retinol concentration...

CONTENTS I N T R O D U C T I O N . VITAMIN A A N D CAROTENOIDS . FOOD SOURCES , ABSORPTION AND TRANSPORT . CONVERSION O F CAROTENOIDS T O RETINOL . C O N C L U S I O N S . . V I T A M I N D . FOOD SOURCES . ABSORPTION . . PHYSIOLOGICAL C O N D I T I O N . C O N C L U S I O N S . . V I T A M I N E . FOOD SOURCES . ABSORPTION, T R A N S P O R T A N D METABOLISM . FACTORS I N F L U E N C I N G BIO...

BACKGROUND Inuit traditional food provides ample amounts of preformed vitamin A. However, the dietary transition away from traditional food raises concerns regarding dietary adequacy. Vitamin A is an essential nutrient with inadequate and excessive exposures having adverse effects. OBJECTIVE To evaluate total dietary vitamin A intake for Canadian Inuit from market food and traditional food so...