alexa Recruitment and results of a pilot trial of vitamin D supplementation in the general population of Australia.
Nutrition

Nutrition

Vitamins & Minerals

Author(s): Tran B, Armstrong BK, Carlin JB, Ebeling PR, English DR,

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Abstract CONTEXT: The benefits of high serum levels of 25-hydroxyvitamin D [25(OH)D] are unclear. Trials are needed to establish an appropriate evidence base. OBJECTIVE: We plan to conduct a large-scale trial of vitamin D supplementation for the reduction of cancer incidence and overall mortality and report here the methods and results of a pilot trial established to inform its design. DESIGN: Pilot D-Health was a randomized trial carried out in a general community setting with 12 months intervention and follow-up. PARTICIPANTS: Participants were 60- to 84-yr-old residents of one of the four eastern Australian states who did not have any vitamin D-related disorders and who were not taking more than 400 IU supplementary vitamin D per day. A total of 644 participants were randomized, and 615 completed the study (two persons withdrew because of nonserious adverse events). INTERVENTIONS: The interventions were monthly doses of placebo or 30,000 or 60,000 IU vitamin D(3). MAIN OUTCOMES: The main outcomes were the recruitment rate and changes in serum 25(OH)D. RESULTS: Ten percent of those approached were recruited. At baseline, the mean 25(OH)D was 42 nmol/liter in all three study arms. The mean change in 25(OH)D in the placebo group was 0.12 nmol/liter, compared with changes of 22 and 36 nmol/liter in the 30,000- and 60,000-IU groups, respectively. CONCLUSIONS: The D-Health pilot has shown that a large trial is feasible in Australia and that a dose of 2000 IU/d will be needed to ensure that a large proportion of the population reaches the target serum 25(OH)D level. This article was published in J Clin Endocrinol Metab and referenced in Vitamins & Minerals

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