25-Hydroxyvitamin D variability within-person due to diurnal rhythm and illness: a case report
Christine B. French; Sharon L. McDonnell; Reinhold Vieth · 2019 · Journal of Medical Case Reports
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract
Abstract Background Vitamin D nutrition research requires accurate measures of circulating 25-hydroxyvitamin D. Our objectives were to test whether a diurnal fluctuation in blood-spot concentrations of 25-hydroxyvitamin D can be demonstrated statistically in a single individual, and whether such fluctuation is affected by the pre-dose versus post-dose timing of the blood draw. Case presentation The participant in this case study was a generally healthy Caucasian woman in her 40s who has taken 5000 IU vitamin D3 supplement at midday for over 1 year. Each blood sample was drawn individually from
Abstract by Christine B. French; Sharon L. McDonnell; Reinhold Vieth, Journal of Medical Case Reports (2019) — licensed CC BY 4.0.
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Metadata source: DOAJ · DOI 10.1186/s13256-018-1948-9