Citrus Lemon (L.) Burman LEMON, A TREASURE OF NATURE In the Middle Ages, the famous doctor Avicenna already recommended it for fight against liver disorders. Its richness in vitamin C was a great ally to fight effectively against scurvy during Columbus expeditions to America. Today it has been found out that in fact lemon is an excellent antiseptic, antibacterial and antiviral. It also helps cleanse the digestive system. we understand now because fifteenth-century navigators adopted it so enthusiasm!