[1, 25-(OH) 2D] published in Table 2 of the article by Diana Rucker and colleagues. 1 They
are about twice as high as those from a similar study done in Denmark, 2 which showed a …

[1, 25-(OH) 2D] published in Table 2 of the article by Diana Rucker and colleagues. 1 They
are about twice as high as those from a similar study done in Denmark, 2 which showed a …

Charoenngam et al.(1) carried out an interesting study to investigate the pharmacokinetics of
both 25 (OH) D3 and vitamin D3 in a small group of healthy subjects and patients with …

One of the major factors responsible for the explosion of knowledge related to vitamin D
metabolism and its relation to clinical disease was the introduction of a competitive protein …

Abstract Serum 25-hydroxyvitamin D (25OHD) is the pre-eminent estimate of vitamin D
status that we have been measuring in a hospital laboratory setting since the 1970s. We …

Abstract The vitamin D External Quality Assessment Scheme (DEQAS) for 25-
hydroxyvitamin D (25-OHD) has approximately 1100 participants in 53 countries using 26 …

The seasonal variation of serum 25-hydroxy vitamin D3 and 1, 25-dihydroxyvitamin D has
been investigated. Blood was taken from 27 healthy volunteers, aged 21–44 years old at 3 …

Octadecyl (C18)” column (JT Baker Chemicals, Phillipsburg, NJ) to separate 25 (OH) D and
1, 25 (OH) 2D before radioassay. To monitor recovery, we added to three 1-mL serum …

Serum 25 OH Vitamin D (25 OH D) concentrations generally vary with latitude, season, and
the composition of the population studied. There is a growing recognition that rather than a …