Dietary Potassium Beneficial on Blood Pressure in Adolescent Girls饮食钾有益于少女血压

A prospective cohort study of adolescent girls in the US concluded that consumption of 3500 mg/d of sodium or more had no adverse effect on blood pressure. The beneficial effects of dietary potassium on both systolic and diastolic blood pressures suggest that consuming more potassium-rich foods during childhood may help suppress the adolescent increase in blood pressure. Participants included 2185 black and white girls initially aged 9 to 10 years from March 1987 and follow-up continued for 10 years. Dietary assessment was conducted using 3-day diet records on two weekdays and one weekend day during eight of the 10 study years. There was no evidence that higher sodium intakes (3000 to 美国一项对青春期少女的前瞻性群组研究得出结论，钠摄入3500毫克/天或以上对血压没有不良影响。饮食钾对收缩压和舒张压的有益效果表明，儿童时期食用更多富含钾的食物可能有助于抑制青少年的血压升高。参加者包括2185名最初年龄9至10岁的黑人和白人女孩，从1987年3月开始，持续随访了10年。在10年研究中的八年采用为期3天（两个工作日和一个周末日）的饮食记录对饮食进行了评估。没有证据表明，高钠摄入量（3000至<4000毫克/天和≥4000毫克/ 天比<2500毫克/天）对青少年血压有不利影响；且纵向混合模型表明，那些食用钠≥3500毫克/天与<2500毫克/天者相比，舒张压一般较低。然而，较高的钾摄入量与整个青春期血压变化和随访结束时的血压成反比。虽然钾钠比值与收缩压也成反比，相对于单独钾的效果而言，这些作用一般较弱。豆类，深色绿叶蔬菜，干果，鳄梨，酸奶，香蕉和鱼是钾的良好食物来源。来源：http://archpedi.jamanetwork.com/