The effect of vitamin D2 and vitamin D3 on intestinal calcium absorption in Nigerian children with rickets.
Thacher TD, Obadofin MO, O'Brien KO, Abrams SA.
J Clin Endocrinol Metab. 2009 Sep;94(9):3314-21. Epub 2009 Jun 30.
PMID: 19567516
Conclusions: Despite similar increases in 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D with vitamin D2 or vitamin D3, fractional calcium absorption did not increase, indicating that rickets in Nigerian children is not primarily due to vitamin D-deficient calcium malabsorption