Tuekpe Mallet K-N, Todoriki Hidemi, Sasaki Satoshi, Zheng Kui-Cheng, Ariizumi Makoto
Department of Environmental and Preventive Medicine, Faculty of Medicine, University of the Ryukyus, Nishihara-cho, Okinawa, Japan.
Hypertens Res. 2006 Jun;29(6):389-96. doi: 10.1291/hypres.29.389.
Potassium, which is abundant in vegetables, is inversely related to blood pressure. Although the situation has changed somewhat in recent years, the Okinawan diet has generally included a large amount of vegetables, and until recently Okinawans had the lowest rates of mortality due to stroke and coronary heart disease in Japan. Based on the hypothesis that these low mortality rates are partly attributable to increased potassium intake resulting from the high vegetable consumption, this study examined whether increasing the consumption of typical yellow-green Okinawan vegetables increases potassium intake. The purpose of this investigation was to determine whether increased consumption of these vegetables should be one of the dietary modifications recommended in public health promotion programs for Okinawans. The study employed 56 healthy, normotensive, free-living Japanese women aged 18-38 years living in Okinawa. They were randomized to a dietary intervention group (n=27) or a control group (n=29). Members of the dietary intervention group received an average weight of 371.4 g/day of a combination of the following vegetables twice weekly through an express home parcel deliver service for a period of 14 days: Goya (Momordica charantia), green papaya (Carica papaya), Handama (Gynura bicolor), Karashina (Brassica juncea), Njana (Crepidiastrum lanceolatium), Fuchiba (Artemisia vulgaris) and Fudanso (Beta vulgaris); and they consumed an average of 144.9 g/day, resulting in a 20.5% increase in their urinary potassium excretion over the baseline (p=0.045). The members of the control group were asked to avoid these vegetables, and the change in potassium excretion in this group was not significant (p=0.595). Urinary sodium and magnesium excretions, systolic and diastolic blood pressures, folic acid, triglycerides and serum high density lipoprotein cholesterol, low density lipoprotein cholesterol and total cholesterols changed non-significantly in both groups. Also, post-intervention urinary potassium excretion correlated positively with vegetable consumption in both the dietary intervention (p<0.0001) and control (p=0.008) groups and with Okinawan vegetable intake in the dietary intervention group (p=0.0004).
蔬菜中富含的钾与血压呈负相关。尽管近年来情况有所变化，但冲绳饮食通常包含大量蔬菜，直到最近，冲绳人因中风和冠心病导致的死亡率在日本一直是最低的。基于这些低死亡率部分归因于高蔬菜摄入量导致钾摄入量增加这一假设，本研究调查了增加冲绳典型黄绿色蔬菜的摄入量是否会增加钾的摄入量。这项调查的目的是确定增加这些蔬菜的摄入量是否应该成为冲绳人公共卫生促进项目中推荐的饮食调整措施之一。该研究选取了56名居住在冲绳、年龄在18至38岁之间、健康、血压正常、自由生活的日本女性。她们被随机分为饮食干预组（n = 27）和对照组（n = 29）。饮食干预组的成员通过快递上门服务，每周两次收到平均重量为371.4克/天的以下蔬菜组合，持续14天：苦瓜（苦瓜）、青木瓜（番木瓜）、红凤菜（紫背菜）、芥菜（芥菜）、山茼蒿（披针叶还阳参）、艾草（艾蒿）和甜菜（甜菜）；她们平均每天食用144.9克，尿钾排泄量比基线增加了20.5%（p = 0.045）。对照组的成员被要求避免食用这些蔬菜，该组钾排泄量的变化不显著（p = 0.
