Lemon is said to have come from India. From there it entered into Europe. It is believed that the origin of the word “lemon” maybe Middle Eastern. The juice of lemon is about 5% to 6% citric acid which gives it the distinct taste. Apart from its amazing culinary uses, like imparting taste and flavor in the dishes to which it is added, lemon has other interesting uses too. It helps with hair care, skin care, to treat burns, indigestion, as a cleaning agent to just mention a few.
In baking lemon/lemon juice is used as an egg substitute in certain recipes (see below).