Lemon is used for culinary and nonculinary purposes throughout the world. The fruit is used primarily for its juice, though the pulp and rind (zest) are also used, primarily in cooking and baking. Lemon juice is about 5% citric acid, which gives lemons a tart taste, and a pH of 2 to 3. This fruit has been known for its therapeutic properties for generations. It is also a root of any home remedy and is normally used to help the stomach (because they have special cleansing effect).