1. From a food science perspective, lemons are alkaline foods. But because lemons contain citric acid, most people mistake lemons for acidic foods. The reason why it is an alkaline food is that although lemons contain citric acid, the citric acid is completely metabolized in the body into carbon dioxide and water. As the carbon dioxide is exhaled out of the body, the acidity is eliminated.

2. The potassium, calcium and other ions in lemons remain in the body in the form of metal cations. These ions can combine with acid ions and reduce the acidity of urine, so they are called alkaline foods. .

3. Not only lemons, but most fruits are alkaline foods.