Calcium Retention in Postmenopausal Women as Influenced by Beef and Other Dietary Components That Induce an Acid Load
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 22
- 试验地点
- 2
- 主要终点
- Calcium Absorption
研究概览
简要总结
The impact of protein sources such as beef as part of Western diet on calcium retention remains controversial. We propose to test the hypothesis that the positive effect of high protein intake (especially from meat protein) can offset the negative effect of protein-induced net acid load on bone metabolism and the retention of body calcium. Healthy postmenopausal women recruited from the community will consume two diets differing in meat protein and acid load for 7 weeks. Calcium retention from diets will be determined using a highly sensitive measurement of whole body retention of a calcium isotope added to the diet.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 40 Years 至 75 Years（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Average body mass index
- •Normal blood work
- •Normal bone density
排除标准
- •Chronic disorder
- •Non-traumatic bone fractures
结局指标
主要结局
Calcium Absorption
时间窗: 18 weeks
After 3 weeks equilibration to the diet, the 2-day menu was extrinsically labeled with Calcium-47 radiotracer and retention was monitored for 28 days by whole body scintillation counting. Percent Calcium-47 absorbed was estimated from the y-intercept of the linear portion of a semilogarithmic plot of percent Calcium-47 retained vs time.
次要结局
未报告次要终点