血清副甲状腺激素水平,维生素D充足度和摄入量之间的关系
Laufey Steingrimsdottir1, Orvar Gunnarsson, Olafur S Indridason
1Public Health Institute of Iceland.
JAMA
|November 10, 2005
概括
适当的维生素D水平对于平衡至关重要,可能会使高摄入不必要. 维生素D补充剂对于北方气候地区的人来说是必不可少的,以保持足够的维生素D状态.
科学领域:
- 营养科学 营养科学
- 内分泌学 在内分泌学.
- 骨健康 骨健康 骨健康
背景情况:
- 越来越多地认识到最佳维生素D状态对骨健康有益,但理想的摄入量水平仍未确定.
- 血清25-基维生素D是维生素D状态的标准生物标志物,但缺乏通用参考范围.
研究的目的:
- 评估高摄入量和血清25-基维生素D水平对平衡的比较意义.
- 为了确定摄入量,维生素D状态和血清完整副甲状腺激素 (PTH) 水平之间的关系.
主要方法:
- 这是一项涉及2310名健康的冰岛成年人三年龄组 (30-45,50-65,70-85岁) 的横截面研究.
- 评估和维生素D的饮食摄入量使用食物频率问卷.
- 参与者根据摄入量 (<800 mg/d,800-1200 mg/d,>1200 mg/d) 和血清25-氧维生素D水平 (<10 ng/mL,10-18 ng/mL,>18 ng/mL) 进行分类.
主要成果:
- 血清PTH水平在血清25-基维生素D>18 ng/mL的个体中最低,在血清25-基维生素D>10 ng/mL的人中最高.
- 在维生素D含量低 (<10 ng/mL) 的个体中,摄入量<800 mg/d与血清PTH较高相比,与>1200 mg/d (P=.04) 相比,摄入量<800 mg/d与血清PTH较高有关.
- 在摄入量>1200 mg/d时,在维生素D摄入量最低和最高的组之间观察到血清PTH的显著差异 (P=.04).
结论:
- 足够的维生素D状态可能会否定超过800毫克/天的摄入量对于代谢的需要.
- 为了达到足够的维生素D状态,建议服用维生素D补充剂,特别是在北度地区.
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