Honey is a sweet, viscous substance made by bees and used as a sweetener, and, in herbal medicine, to promote healing and fight infection. It was used by Gaius to treat Gwaine's leg wound in the Season 3 episode Gwaine. It was also seen as suitable food as Gwaine once approached a hive in search of honey.
Honey has been used, both for cooking and in traditional medicine, for thousands of years. The ancient Greeks and Romans used it to treat wounds, and local honey is used in modern times as well to combat various illnesses.