But lemon is an alkaline food. It is an alkaline food because part of it is the presence of citrate, which is eaten by people in the body at first to generate citrate, citric acid and organic salts in the body completely metabolized to generate carbon dioxide and water, and with the carbon dioxide exhaled out of the body, the acidity is eliminated. These cations however are left in the body. Creating more alkalinity.
And lemon in the potassium, calcium and other ions but in the form of metal cations to stay in the body, these ions can be combined with acid ions, can reduce the acidity of the urine, so it is known as "alkaline food". Not only lemon, most fruits are alkaline food.