Lemon
Wiki, Facts

 Lemon facts

• The tree's ellipsoidal yellow fruit is used for culinary and non-culinary purposes throughout the world, primarily for its juice, which has both culinary and cleaning uses
• The pulp and rind (zest) are also used in cooking and baking
• The juice of the lemon is about 5% to 6% citric acid, which gives a sour taste
• The distinctive sour taste of lemon juice makes it a key ingredient in drinks and foods such as lemonade and lemon meringue pie