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Do you keep getting one cold after another? That could be due to a vitamin D deficiency. It is vital for our bone structure and immune system. The body can even produce it itself, but it needs sunlight to do so. This is particularly difficult in winter and vitamin D deficiency can quickly develop. So should you cover your vitamin D needs with food supplements, such as tablets or drops? Dr. Julia Fischer explains how you can get well supplied through the winter, what the causes and symptoms of a deficiency are and why you can save yourself a trip to the solarium. The reference values in nanograms per milliliter: Vitamin D levels of over 30 nanograms per milliliter of blood are considered sufficient. A vitamin D deficiency is defined as levels below 20 nanograms. 00:00 - Vitamin D pills for everyone (...?) 00:35 - What is vitamin D? 02:20 - When do I have a vitamin D deficiency? 02:50 - How vitamin D deficiency occurs 04:30 - Vitamin D deficiency = diseases? 05:30 - A look at the studies 07:00 - Absurdly high intake recommendations 08:00 - Who should take vitamin D 09:50 - Take vitamin D in winter? Our sources: https://www.rki.de/SharedDocs/FAQ/Vit... https://www.uptodate.com/contents/vit... https://profeat-akademie.de/wp-conten... https://medizin-transparent.at/vitami... https://www.ncbi.nlm.nih.gov/books/NB... https://www.rki.de/DE/Content/Gesundh... Author team: Tina Roth and Niels Nagel Credit: picture alliance #NDR #vitamind #supplements ___________________________________________________ ARD GESUND with Dr. Julia Fischer is a YouTube channel of the ARD health editorial departments