Journal
EUROPEAN JOURNAL OF NUTRITION
Volume -, Issue -, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00394-023-03255-0
Keywords
Vitamin D; Dietary supplements; Guideline adherence; Infant; Child
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There is generally poor adherence to vitamin D supplementation guidelines in children under five years of age, with limited research conducted mainly in infants and high methodological heterogeneity. Further research is needed to identify effective health promotion interventions to increase adherence and reduce the risk of vitamin D deficiency at this critical life stage.
PurposeDespite the presence of guidelines on vitamin D supplementation in infants and young children, little is known about parental adherence to their recommendations. This review aims to summarise the evidence from observational studies investigating adherence to vitamin D supplementation guidelines in children under five years of age.MethodsDatabases of PubMed, Scopus, Web of Science, and CINAHL were searched from January 2000 until July 2022. Qualitative data synthesis was used to summarise evidence on supplementation adherence. The adherence rate was categorised as low, moderate, and high if it was <= 50%, between 50 and 70%, and >= 70%, respectively.ResultsEleven studies investigating adherence to eight different vitamin D supplementation guidelines from European countries, USA and Canada were included. The majority of studies were cross-sectional and conducted among infants. Overall, the adherence rate ranged between 14.29% and 95.6%. Low, moderate, and high adherence to supplementation guidelines were reported in six, three, and two studies, respectively.ConclusionThere is generally poor adherence to vitamin D supplementation guidelines in children under five years of age. Nevertheless, the evidence comes from a limited number of studies, mainly conducted in infants, with high methodological heterogeneity in terms of the vitamin D supplementation guideline assessed and the definition of supplementation adherence in the study population. Further research is warranted to identify effective health promotion interventions to increase supplementation adherence and reduce the risk of vitamin D deficiency at this critical life stage.
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