serial vitamin d3 ( d3 ) and 25-hydroxyvitamin d3 ( 25 oh d3 ) concentrations of plasma were measured in confined , shorn sheep that had either been supplemented with vitamin d3 ( 50 micrograms/d ) or exposed daily to ultraviolet irradiation ( uvi ) .
C0006657
25-hydroxyvitamin d3
C2713074
25 oh d3