Updated 15 July 2014

Vitamin D supplements not always helpful

Vitamin D supplements provide no benefit in women with normal vitamin D levels, a new study finds.

The women in the study were divided into four groups: one group received a combination of vitamin D and calcium; one group took 1 200 milligrams of calcium daily; one group took 4 000 IU of vitamin D daily; and one group took an inactive placebo. Levels of bone turnover markers, such as parathyroid hormone levels in the blood, were assessed for six months.

Decline in bone turnover


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