Vitamin D in Food Supplements: Labeling Survey

Alexandra Figueiredo (Instituto Universitário Egas Moniz (IUEM), Monte de Caparica, Portugal;Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, Quinta da Granja, Almada, Portugal)
Maria Deolinda Auxtero (Instituto Universitário Egas Moniz (IUEM), Monte de Caparica, Portugal;Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, Quinta da Granja, Almada, Portugal)
Maria Guilhermina Moutinho (Instituto Universitário Egas Moniz (IUEM), Monte de Caparica, Portugal;Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, Quinta da Granja, Almada, Portugal)
Inês Neves (Instituto Universitário Egas Moniz (IUEM), Monte de Caparica, Portugal;Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, Quinta da Granja, Almada, Portugal)
Raquel Inez (Instituto Universitário Egas Moniz (IUEM), Monte de Caparica, Portugal)
Isabel Margarida Costa (Instituto Universitário Egas Moniz (IUEM), Monte de Caparica, Portugal;Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, Quinta da Granja, Almada, Portugal)

Article ID: 3716

DOI: https://doi.org/10.30564/jim.v10i2.3716

Abstract


An adequate vitamin D (vitD) intake (Recommended Daily Allowance,RDA= 5µg) is crucial for health maintenance and its deficiency isassociated with several health problems. The increase in hypovitaminosisD cases and the proliferation of food supplements (FS) that are easilyaccessible by the population, have led to an unrestrained chronicconsumption of FS. VitD may accumulate in the body and originatetoxicity (Tolerable Upper Limit, UL=100 µg). The aim of this study was toevaluate if daily vitD doses mentioned in FS labels are in conformity withRDA. 210 solid and liquid FS (for pediatrics and adults) sold in Portuguesepharmacies, supermarkets, health shops and on the internet were examinedfor indicated daily intake of vitD and compared to RDA and UL values.51.43% of FS have values higher than RDA, 8.57% higher than UL. Theaverage vitD daily dose in FS is 24.48 µg, with a high variability betweensamples (0.25 - 250 µg). Majority of FS labels recommend vitD daily dosesabove RDA and some even above UL, regardless of being for adults orchildren. Therefore, it is crucial that vitD dose in FS is reviewed to ensurethe safety of these products.

Keywords


Vitamin D; Food Supplements; RDA; Safety; Labelling; Daily dose

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References


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Copyright © 2021 Alexandra Figueiredo, Mari Deolinda Auxtero, Maria Guilhermina Moutinho, Inês Neves, Raquel Inez, Isabel Margarida Costa


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