Figure 2From: Randomized comparison of the effects of the vitamin D3adequate intake versus 100 mcg (4000 IU) per day on biochemical responses and the wellbeing of patientsBiochemical responses to vitamin D3 supplementation of endocrine outpatients during one year. Open bars indicate pre-supplementation data; boxes with intermediate shading indicate data at 2–6 months; darkest boxes, indicate data after >6 months of vitamin D. By the second visit after starting vitamin D, plasma 25(OH)D was higher in those taking 100 mcg/day than in those taking 15 mcg/day (values marked b differ significantly from the group's baseline values marked a, p < 0.001, by paired t-test). 25(OH)D values marked b differ significantly from each other, conventional Students t-test, p = 0.006). PTH values marked c differ significantly from the group's baseline value, p = 0.003; PTH values marked d differ significantly from the group's baseline value, p = 0.013.Back to article page