动物实验表明 ,给动物喂食中毒量维生素Ａ可影响骨骼修复 ,对骨骼具有有害效应 ,有人认为长期大量摄入维生素Ａ可能会增加骨折的危险。为评价绝经后妇女大量摄入或补充维生素Ａ与髋部骨折危险的关系而进行前瞻性分析。方法　美国 1 1个州的注册护士参加 ,选择72 3 3 7例绝经后 Animal experiments show that feeding animal poisoning vitamin A can affect skeletal repair, has a detrimental effect on the bones, some people think that long-term high intake of vitamin A may increase the risk of fractures. Prospective analysis was performed to evaluate the relationship between postmenopausal women taking large amounts of vitamin A supplementation and the risk of hip fracture. Methods Registered nurses from 11 states participated in the study. 72,337 postmenopausal women were enrolled