Moderate Amounts of Vitamin D3 in Supplements are Effective in Raising Serum 25-Hydroxyvitamin D from Low Baseline Levels in Adults: A Systematic Review

Autor: Jean-Philippe Bonjour, Flore Dontot Payen, Susan J. Whiting, Brigitte Rousseau
Rok vydání: 2015
Předmět:
Zdroj: Nutrients, Vol 7, Iss 4, Pp 2311-2323 (2015)
Nutrients
Nutrients, Vol. 7 (2015) pp. 2311-2323
ISSN: 2072-6643
DOI: 10.3390/nu7042311
Popis: There is controversy surrounding the designation of vitamin D adequacy as defined by circulating levels of the metabolite 25-hydroxyvitamin D (25(OH)D). Depending on the cutoff level chosen, dietary intakes of vitamin D may or may not provide sufficient impact upon vitamin D status measured as improvement in serum levels of 25(OH)D. We sought to examine whether modest daily doses (5–20 μg) as found in fortified foods or multivitamin supplements had a measureable impact on vitamin D status, defined as moving from below to above 50 nmol/L, or from less than 30 nmol/L to above 30 nmol/L. Published literature was searched for relevant articles describing randomized controlled trials. Exclusion criteria were: studies not involving humans; review articles; studies lacking blood level data pre- and post-treatment; no control group; bolus treatments (weekly, monthly, yearly); vitamin D 20 μg; baseline 25(OH)D ≥75 nmol/L; subjects not defined as healthy; studies 50 nmol/L) or from “deficient” (30 but
Databáze: OpenAIRE