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  • Title: Vitamin D2 versus vitamin D3 supplementation in hemodialysis patients: a comparative pilot study.
    Author: Daroux M, Shenouda M, Bacri JL, Lemaitre V, Vanhille P, Bataille P.
    Journal: J Nephrol; 2013; 26(1):152-7. PubMed ID: 22641581.
    Abstract:
    BACKGROUND: In patients with chronic kidney disease, vitamin D insufficiency is highly prevalent. It can be corrected by supplementation with either vitamin D(2) or vitamin D3. Recent studies in patients without impaired kidney function suggest that vitamin D(3) is more efficient than vitamin D(2) in correcting vitamin D insufficiency. However, no direct comparison has been made in hemodialysis (HD) patients. METHODS: Thirty-nine HD patients with serum 25-hydroxyvitamin D (25(OH)D) levels =20 ng/mL were enrolled in this comparative, prospective pilot study. They were divided into 3 groups and treated over a 3-month period. Each patient received oral doses of 200,000 international units (IU) vitamin D per month according to the following treatment schedule: (i) vitamin D(2) in small fractionated doses at each HD session, 3 times per week (group D2S); (ii) vitamin D(2) once a month (group D2M); or (iii) vitamin D(3) once a month (group D3M). Changes in serum 25(OH)D levels were measured at the end of the study. RESULTS: Posttreatment serum 25(OH)D levels increased significantly in all groups. The mean ± SD serum 25(OH)D value for group D3M patients (40 ± 13 ng/mL) was significantly higher than that for groups D2M (25 ± 9 ng/mL, p<0.01) and D2S patients (25 ± 9 ng/mL, p<0.01). Serum 25(OH)D increased to levels >30 ng/mL in 84% of group D3M patients, but in only 15% and 27% of group D2M and D2S subjects, respectively. CONCLUSION: Vitamin D(3) is more effective than vitamin D(2) in providing adequate 25(OH)D serum levels in HD patients.
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