Despite apparent method similarities between laboratories there appear to be confounding
factors inhibiting uniform reporting and standardisation of vitamin assays. The Australasian …

Aim To survey laboratories enrolled in the Royal College of Pathologists of Australasia
(RCPA) Chemical Pathology Quality Assurance Programme (QAP) for vitamin A and E …

Laboratory Assessment of Vitamin Status provides a comprehensive understanding of the
limitations of commonly used approaches used for the evaluation of vitamin status, reducing …

The clinical importance of vitamin A as an essential nutrient has become increasingly clear.
Adequate vitamin A is required for normal organogenesis, immune competence, tissue …

OBJECTIVES: The RCPA Quality Assurance Program (RCPA QAP) offers monthly
proficiency testing for vitamins A, B1, B6, β-carotene, C and E to laboratories worldwide. A …

Abstract In Standard Reference Material 968b, fat-soluble vitamins and cholesterol in human
serum, certified values are provided for cholesterol, retinol, retinyl palmitate, α-tocopherol …

Standard Reference Material 968c Fat-Soluble Vitamins, Carotenoids, and Cholesterol in
Human Serum provides certified values for retinal, δ-, γ-, and α-tocopherol, trans-and total β …

Vitamin A, or retinol, is an essential nutrient for man and all mammalian species since it
cannot be synthesised within the body. Deficiency of the vitamin results in adverse effects on …

Our aim was to assess the suitability of ultra-high performance liquid chromatography
(UHPLC) for the simultaneous determination of biomarkers of vitamins A (retinol, retinyl …

Needs and sources of carotenoids and vitamin A Needs and sources of carotenoids and
vitamin A Abstract Some of the current reasons for the prevalence of vitamin A inadequacy and …