This refers to foods that have a higher content of acid-forming minerals such as phosphorus, sulfur, and chlorine in their ash than alkaline-forming minerals such as potassium, calcium, magnesium, and sodium. Conversely, foods that have more alkaline-forming minerals are called alkaline foods. Main foods include grains, meat, fish, eggs, and some legumes that are high in phosphorus and sulfur. It has been said that consuming a lot of acidic foods makes the body acidic, but bodily fluids have the ability to maintain a slightly alkaline pH level of 7.4. Therefore, it is considered inappropriate to link such food classifications with health. [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 |
食品の灰分中、カリウム、カルシウム、マグネシウム、ナトリウムなどのように、アルカリをつくる無機質よりも、リン、硫黄(いおう)、塩素などのように酸をつくる無機質の含量が多い食品をいう。逆にアルカリをつくる無機質のほうが多い食品をアルカリ性食品という。おもな食品としてリンや硫黄の多い穀類、肉類、魚類、卵、一部の豆類などが含まれる。酸性食品を多くとると体が酸性になるなどといわれたが、体液はつねに水素イオン濃度指数(pH)7.4の微アルカリ性を保つ機能が備わっている。したがって、このような食品の分類と健康を結び付けることは、不適当とされている。 [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)』 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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