Ibn Qayyim in "Medicine of the Prophet" said, “Honey will add softness and beauty to the hair while allowing it to grow longer. When honey is applied to the eye as a Kuhl, it will strengthen weak eyesight. Honey whitens the teeth, preserves their health and the health of the gums, opens the orifice of the veins along with causing the flow of menstruation. Furthermore, licking honey on an empty stomach will help the body get rid of mucus and phlegm.”