Vitamin D in Food Supplements: Labeling Survey

Updata:01-01-1970

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By:Alexandra Figueiredo, Mari Deolinda Auxtero, Maria Guilhermina Moutinho, Inês Neves, Raquel Inez, Isabel Margarida Costa

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 is
associated with several health problems. The increase in hypovitaminosis
D cases and the proliferation of food supplements (FS) that are easily
accessible by the population, have led to an unrestrained chronic
consumption of FS. VitD may accumulate in the body and originate
toxicity (Tolerable Upper Limit, UL=100 µg). The aim of this study was to
evaluate if daily vitD doses mentioned in FS labels are in conformity with
RDA. 210 solid and liquid FS (for pediatrics and adults) sold in Portuguese
pharmacies, supermarkets, health shops and on the internet were examined
for 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. The
average vitD daily dose in FS is 24.48 µg, with a high variability between
samples (0.25 - 250 µg). Majority of FS labels recommend vitD daily doses
above RDA and some even above UL, regardless of being for adults or
children. Therefore, it is crucial that vitD dose in FS is reviewed to ensure
the safety of these products.
References:

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