Alkaline foods

Japanese: アルカリ性食品 - あるかりせいしょくひん
Alkaline foods

This refers to foods that contain more alkaline-forming minerals such as potassium, calcium, magnesium, and sodium than acid-forming minerals such as phosphorus, sulfur, and chlorine. In contrast, foods that contain a lot of acid-forming minerals are called acidic foods. The measurement method is to burn a certain amount of food, dissolve the ash obtained in water, and measure the amount of acid needed to neutralize it, or to perform elemental analysis of the ash and calculate from the difference in milligram equivalents of the two groups of elements. Generally, vegetables, fruits, seaweed, mushrooms, and potatoes that are high in potassium and calcium fall into this category. Alkaline foods are said to be good for your health because body fluids are maintained at a hydrogen ion concentration index (pH) of 7.4, but the body's functions are always maintained at a constant alkalinity, so they are not affected by the foods you ingest.

[Tomomi Kono and Yonago Yamaguchi]

"Misconceptions about Alkaline and Acidic Foods" by Michio Yamaguchi, edited by the National Dietetic Association and the Japan Dietetic Association Nutrition Guidance Institute (1987, Daiichi Publishing)

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

食品に含まれている無機質のうち、カリウム、カルシウム、マグネシウム、ナトリウムなどアルカリをつくるものが、リン、硫黄(いおう)、塩素など酸をつくるものよりも多い食品をいう。これに対して酸をつくる無機質の多いものを酸性食品という。測定法は、一定量の食品を焼いて得た灰分を水に溶かし、これを中和させるのに必要な酸の量をみるか、灰分中の元素分析を行い、両群の元素のミリグラム当量の差から算出する。一般に、カリウムやカルシウムの多い野菜、果実、海藻、キノコ、いもなどがこれに入る。体液が水素イオン濃度指数(pH)7.4に維持されていることから、アルカリ性食品が健康によいといわれたが、体の機能はつねに一定のアルカリ度を保っているので、摂取する食品によって影響は受けない。

[河野友美・山口米子]

『山口迪夫著、国民栄養振興会・日本栄養士会栄養指導研究所編『アルカリ性食品・酸性食品の誤り』(1987・第一出版)』

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