Lemons are oval-shaped citrus fruits with a smooth, porous rind that can be greenish yellow or bright yellow in color. They are rich in vitamin C and citric acid, and have a tart, tangy flavor. Lemons are used in many cuisines and have many other uses, including: (1)Food: Lemon juice is a common ingredient in cooking and is used in drinks, sauces, dips, and as a garnish for meat and fish. Lemon juice can also be used to tenderize meat and neutralize the taste of amines in fish. (2) Cleaning: The citric acid in lemon juice can kill bacteria and other germs. (3) Preservative: Lemon juice can be used to keep sliced apples crisp and white for about a day. (4) Pain relief: Lemon juice can be used to relieve the pain of bee stings. (5) Fragrance: Lemon oil is used in perfumes, soaps, and skin creams.