According to a very large study (72,000 women for 18 years) women who had consumed on average 500 international units (iu) of vitamin D3 daily from a combination of food and supplements had developed a 37% lower risk of hip fracture than women who had consumed less than an average 160iu a day.

The researchers also concluded that, for older women, vitamin D3 intake had provided better protection for bones than calcium.

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