Translations:Vitamin D/82/en

A study published in 2017 assessed the prevalence of high daily intake levels of supplemental vitamin D among adults ages 20+ in the United States, based on publicly available NHANES data from 1999 through 2014. Its data shows the following:

• Over 18% of the population exceeds the NIH daily recommended allowance (RDA) of 600–800 IU, by taking over 1000 IU, which suggests intentional supplement intake.
• Over 3% of the population exceeds the NIH daily tolerable upper intake level (UL) of 4000 IU, above which level the risk of toxic effects increases.
• The percentage of the population taking over 1000 IU/day, as well as the percentage taking over 4000 IU/day, have both increased since 1999, according to trend analysis.