Foods containing acetic acid and other weak acids are called alkaline foods. This is because these weak acids are metabolized and finally eliminated from the body in the form of weak acid salts. For weak acids, weak acid salts are weak bases, so foods containing weak acids such as acetic acid are called alkaline foods.

It is beneficial to use some so-called alkaline foods containing weak acids, such as acetic acid, which can remove sodium ions from the body in the form of sodium acetate.