title: [Advances on studies related to the requirement of vitamin A for infants, young and preschool children].
abstract: There are many factors that could affect the requirement of vitamin A including infections, parasites, protein-energy malnutrition, bioconversion efficiency of provitamin A, food matrix and so on. However, the toxicity of vitamin A should also be taken into account when establishing reference values for infants, young and preschool children. Serum and breast-milk retinol concentrations, retinol binding protein concentrations, the relative-dose-response test , the modified-relative-dose-response and the deuterated retinol isotope dilution test are the common tools to assess vitamin A status.
authors.affiliation: Department of Nutrition and Food Hygiene, Beijing Center for Disease Control and Prevention, Beijing 100013, China.
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Yu
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhao
authors.forename: Lili
authors.initials: L
authors.lastname: Pan
authors.forename: Shian
authors.initials: S
authors.lastname: Yin
mesh_terms: D002664:Child Nutritional Physiological Phenomena; D002675:Child, Preschool; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D007201:Indicator Dilution Techniques; D007223:Infant; D008297:Male; D009752:Nutritional Status; D012177:Retinol-Binding Proteins / Q000032:analysis; D014801:Vitamin A / Q000008:administration & dosage* / Q000032:analysis / Q000097:blood; D014802:Vitamin A Deficiency / Q000517:prevention & control
chemical_list: D012177:Retinol-Binding Proteins; D014801:Vitamin A