Bone Abstracts

Vitamin D deficiency is common within Europe and the Middle East, especially in risk groups. While treatment is simple, there is no consensus on the diagnostic threshold for deficiency and the required dose. The Institute of Medicine and the Endocrine Society have established guidelines on the required 25-hydroxyvitamin D (25(OH)D) levels, supplementation doses and (extra)skeletal effects of vitamin D, coming to very different conclusions. The European Calcified Tissue Society...

We have previously shown a high prevalence of vitamin D inadequacy (serum 25-hydroxyvitamin D (S25(OH)D) <50 nmol/l) in adolescents (14–18 years) in the UK (51°N)(1). It is well recognised that vitamin D deficiency (S25(OH)D <25 nmol/l) increases the risk of rickets and impaired growth in adolescents, however the optimal vitamin D status for bone health is debated. The aim of this study was to investigate the effects of vitamin D status on bone hea...

Suppression of parathyroid hormone (PTH) has been suggested as a potential biochemical outcome measure for determining the optimal serum 25-hydroxyvitamin D (S25(OH)D) concentration for bone health in adults. However, in adolescents increases in PTH may not be driven by the same mechanisms and may not be detrimental to bone health. Adolescent studies have provided a wide range of estimates of the S25(OH)D concentration at which PTH plateaus (40–90 nmol/l), with some repor...