The antifracture efficacy of vitamin D in adults - are we assessing it reliably? A systematic review.

The analysed studies did not conclusively assess the vitamin D antifracture efficacy in patients with prestudy low serum vitamin levels, due to the lack of assessment of whether sufficient doses of vitamin D were used. They informed about the relevant doses and preparations of vitamin D in particular groups (specific fracture risk, age, place of residence) only.