Searchable abstracts of presentations at key conferences on calcified tissues

ba0005lb11 | (1) | ECTS2016

25(OH)D3 half-life is not influenced by vitamin D supplementation dose

Schoenmakers Inez , Assar Shima , Aspray Terry , Prentice Ann , Jones Kerry

There is wide variation in the dose-response to oral vitamin D and the increment in plasma 25(OH)D decreases per unit vitamin D given. We hypothesised that this is related to increased 25(OH)D catabolism as reflected in 25OHD half-life (25(OH)D3 t1/2).Design: 25(OH)D3 t1/2 was measured with a stable isotope (SI) technique in older (70y+) men and women in the UK during winter before (<...

ba0003oc6.3 | Osteoporosis treatment and the effects of physical activity | ECTS2014

Vitamin D is low in obesity, and this is due to greater volume of distribution

Walsh Jennifer S , Evans Amy L , Bowles Simon , Naylor Kim E , Gossiel Fatma , Jacques Richard , Schoenmakers Inez , Jones Kerry S , Eastell Richard

Low circulating levels of total 25-hydroxyvitamin D (25OHD) have been reported in obese people of different ethnicities in several countries. Low total 25OHD in obesity could be due to lower binding proteins (with normal free 25OHD), lower dietary intake or sunlight exposure, greater volume of distribution (pool size) or more rapid metabolic clearance.The aims of this study were to determine if free 25OHD and 1,25-dihydroxyvitamin D (1,25(OH)2...