An estimated 31% of adults in Australia have inadequate vitamin D status (serum 25-hydroxyvitamin D level < 50 nmol/L), increasing to more than 50% in women during winter–spring and in people residing in southern states. V itamin D status has emerged as a significant public health issue in Australia and New Zealand. There is good evidence that vitamin D plus calcium supplementation effectively reduces fractures and falls in older men and women. People in high-risk groups may require higher doses. When sun exposure is minimal, vitamin D intake from dietary sources and supplementation of at least 600 IU (15 μg) per day for people aged ≤ 70 years and 800 IU (20 μg) per day for those aged > 70 years is recommended.
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