Certain malabsorption disorders, such as cystic fibrosis, celiac disease, short bowel syndrome and inflammatory bowel disease, can also result in a severe vitamin D deficiency, notes a 2015 review ...

Others at higher risk for developing vitamin D deficiency include those who have dark skin, fat malabsorption disorders, inflammatory bowel disease or are older adults. Without enough of this ...

We are not talking about those with suspected vitamin D deficiency such as those with nutritional deficiencies, osteoporosis, [or] malabsorption,” he told Healthline. The Task Force members ...

Previously, the Endocrine Society defined vitamin D levels in terms of "deficiency" and "insufficiency" based on serum 25-hydroxyvitamin D (25[OH]D) levels. However, the new guidelines no longer ...