The acid and alkaline content of a substance is measured by a pH score. A pH of zero indicates a pure acid, a score of 14 represents a pure alkali, and a score of seven is neutral.

The human body is designed to be slightly alkaline, with blood that has a pH score of 7.4. The body works hard to maintain this pH, as this is where it is the healthiest. However, many common lifestyle and dietary habits drive the body's pH downward into the acid range.

There are two easy solutions: refrain from consuming foods that are either high in acid or that are alkaline but turned into acid when digested by the body; and consume large quantities of alkaline foods and acid foods that are turned into alkalines when digested by the body.