Figure 2. Circulating 25(OH)D as a Function of Vitamin D3 Status in Supplemented Subjects.
Circulating 25(OH)D as a function of circulating vitamin D3 in high dose (6,400 IU vitamin D3/day) subjects. Best-fit regression analysis yielded the equation y = 30.8 + 0.7x − 0.01X2, r2= 0.60, n=82.