Answers are grounded in this paper and cite their sources.
D Lissner, R S Mason, S Posen; Stability of vitamin D metabolites in human blood serum and plasma., Clinical Chemistry, Volume 27, Issue 5, 1 May 1981, Pages 77
No takes yet. Share an insight, caveat, or question.
Lissner et al. (1981) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: