There is high quality evidence that vitamin D plus calcium is associated with a statistically significant reduction in incidence of new non-vertebral fractures .
Vitamin D alone is unlikely to prevent fractures in the doses and formulations tested so far in older people .
Supplements of vitamin D and calcium may prevent hip or any type of fracture .
There was a small but significant increase in gastrointestinal symptoms and renal disease associated with vitamin D and calcium .
This review found that there was no increased risk of death from taking calcium and vitamin
BACKGROUND Vitamin D and related compounds have been used to prevent  osteoporotic fractures in older people .
This is the third up date of a Cochrane review first published in 1996 .
OBJECTIVES To determine the effects of vitamin D or related compounds , with or without calcium , for preventing  fractures in post-menopausal women and older men .
Single-dose cholecalciferol suppresses the winter increase in parathyroid hormone concentrations in healthy older men and women: a randomized trial.
A r and omized double-blind controlled trial of a single oral dose of 2.5 mg ( 100,000 IU ) cholecalciferol ( vitamin D3 ) was conducted in the winter in 189 healthy free-living men and women aged 63 - 76 y. The mean baseline serum concentration for 25-hydroxyvitamin D was 34.5 nmol/L and for parathyroid hormone 3.18 pmol/L. After 5 wk , mean serum 25-hydroxyvitamin D concentrations were 60 % higher in the treated than in the placebo group ( P < 0.001 ) . There was a 12 % difference in parathyroid hormone concentrations in the treated compared with the placebo group ( P < 0.001 ) . No differences in serum calcium were seen . Findings suggest that 25-hydroxyvitamin D has a physiological role in the regulation of parathyroid secretion independent of serum calcium in healthy elderly people .  Parathyroid concentrations rise and 25-hydroxyvitamin D concentrations decline with age . These results may have implication s for the prevention of osteoporotic fractures that occur with increased frequency in winter and in elderly people
There is high quality evidence that vitamin D plus calcium is associated with a statistically significant reduction in incidence of new non-vertebral fractures .
Vitamin D alone is unlikely to prevent fractures in the doses and formulations tested so far in older people .
Supplements of vitamin D and calcium may prevent hip or any type of fracture .
There was a small but significant increase in gastrointestinal symptoms and renal disease associated with vitamin D and calcium .
This review found that there was no increased risk of death from taking calcium and vitamin
BACKGROUND Vitamin D and related compounds have been used to prevent  osteoporotic fractures in older people .
This is the third up date of a Cochrane review first published in 1996 .
OBJECTIVES To determine the effects of vitamin D or related compounds , with or without calcium , for preventing  fractures in post-menopausal women and older men .