Vitamin D deficiency guidance issued for Austria and Djibouti

A health guide for Austria and the broader DACH region outlines the functions of vitamin D, the groups at higher risk of deficiency (people with limited sun exposure, older adults, those with darker skin, obesity, chronic organ disease, and residents of care homes), and how to diagnose the condition using blood tests. It advises cautious use of high‑dose supplements and emphasizes practical steps such as safe sunlight exposure and dietary sources.

Another report details the laboratory reference ranges for 25‑hydroxyvitamin D, citing the German Robert Koch‑Institute and the U.S. Institute of Medicine. It defines a serum level of 30–50 ng/mL as optimal, describes categories ranging from severe deficiency (<10 ng/mL) to potential over‑supplementation (>50 ng/mL), and lists associated health risks such as bone disorders, heart‑rhythm problems, and kidney stones.