Vitamin D deficiency (serum 25-hydroxyvitamin D (25 (OH) D)< 50 nmol/L or 20 ng/mL) is
common in Europe and the Middle East. It occurs in< 20% of the population in Northern …

Abstract The 2 nd International Conference on Controversies in Vitamin D was held in
Monteriggioni (Siena), Italy, September 11-14, 2018. The aim of this meeting was to address …

Background Vitamin D deficiency (serum 25 (OH) D< 50nmol/l) is common in Ireland,
particularly amongst older adults, hospital inpatients and nursing home residents. Vitamin D …

Aging affects the formation of 1, 25-dihydroxyvitamin D (1, 25 [OH] 2D; calcitriol), the active
form of vitamin D. Production of 1, 25 (OH) 2D is reduced by 50% as a result of an age …

Abstract Background: The 2007–2010 NHANES provides the first US nationally
representative serum 25-hydroxyvitamin D [25 (OH) D] concentrations measured by …

Population ageing is rapidly progressing and it is estimated that by 2050 one in every five
people globally will be aged 60 years or over. Research has shown that adequate nutritional …

Background Few data are available examining the determinants of vitamin D status
exclusively in older adults. We aimed to investigate the prevalence and determinants of …

ABSTRACT Background: The Vitamin D Standardization Program (VDSP) has developed
protocols for standardizing procedures of 25-hydroxyvitamin D [25 (OH) D] measurement in …

Abstract Knowledge about the distributions of serum 25-hydroxyvitamin D (25 (OH) D)
concentrations in representative population samples is critical for the quantification of …

Abstract BACKGROUND 24, 25-Dihydroxyvitamin D [24, 25 (OH) 2D] in serum may be both
a nuisance and nutritionally valuable. METHODS We investigated the impact of 24, 25 (OH) …