Vitamin D deficiency is a common condition that can cause muscle and bone pain, fatigue, and disorders of calcium and bone metabolism.
Vitamin D is less a vitamin than a potent prohormone. It plays a critical role in almost every area of human physiology, from the regulation of calcium and phosphate metabolism and the support of the immune system to bone mineralisation and muscle function. A large part of the body's vitamin D is synthesised when sunlight reaches the skin, and the rest comes from food.
Because of modern living conditions, long periods spent indoors, sunscreen use and geographical factors, vitamin D deficiency is common in the general population. At eKonsey, our Multidisciplinary Council of experienced physicians in endocrinology, metabolic diseases and nutritional medicine takes a holistic approach to resistant vitamin D deficiency, malabsorption and its hormonal consequences.
A second specialist's review of your Vitamin D Deficiency diagnosis or treatment plan can clarify your next step. On eKonsey this review is done online.
Last updated: October 15, 2026