Aarhus University Hospital
Lars Rejnmark, MD, Ph.D., DMSc, is a professor of endocrinology at Aarhus University and serves as a consultant at Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Denmark. He has published more than 200 papers in peer-reviewed scientific journals focusing on calcium homeostasis, the vitamin D-parathyroid axis, and bone metabolism.
During the last decades, a large number of studies have suggested an inverse association between plasma 25-hydroxyvitamin D levels and risk of skeletal and non-skeletal diseases. More recently, a number of randomized clinical trials have not been able to document beneficial effects of vitamin D supplementation. However, people included in the trials have not been suffering from vitamin D insufficiency. This raises the question of whether these trials actually have tested the hypothesis suggested by observational studies on adverse health effects of low vitamin D levels.