@inbook{3f76a2e20daf416db6eb73c168abf8c9,
title = "Worldwide Vitamin D Status",
abstract = "Vitamin D status and the prevalence of vitamin D deficiency and insufficiency have been addressed in many studies covering all continents. Vitamin D deficiency, when serum 25-hydroxyvitamin D is lower than 25. nmol/L, occurs in risk groups all over the world, mainly in the Middle East, China, Mongolia, and India. Risk groups for poor vitamin D status are children especially those with low birth weight, adolescents, pregnant women, older persons, and non-Western immigrants. A vitamin D status can be considered adequate (serum 25-hydroxyvitamin D >50. nmol/L) in less than 50% of the world population at least in winter. Prevention requires moderate sunlight exposure, consumption of fish, fortification of foods, and the use of vitamin D supplements.",
keywords = "Ethnic differences, Sunlight exposure, Vitamin D deficiency, Vitamin D insufficiency, Vitamin D nutrition",
author = "{van Schoor}, Natasja and Paul Lips",
year = "2017",
month = dec,
day = "14",
doi = "https://doi.org/10.1016/B978-0-12-809963-6.00059-6",
language = "English",
isbn = "9780128099650",
series = "Vitamin D: Fourth Edition",
publisher = "Elsevier Inc.",
pages = "15--40",
booktitle = "Vitamin D: Fourth Edition",
address = "United States",
}