Lemon is grown in a small tree, and it is native from Asia.
It is a citric fruit: lemon juice contains about 5-6% citric acid. Because of that, it can be useful for cleaning.
Because lemons are high in vitamin C, they can prevent a disease called “scurvy” which was common among sailors stuck on ships for months. Even today, the British Navy requires ships to carry enough lemons so that every sailor can have one ounce of juice a day.
Its juice, zest and pulp are often used for cooking, to add taste to food. Also, its leaves can be used to make tea.