Juniper hung at the door protects against evil forces and persons. It can be added to love mixtures and increases male potency. When burned it aids psychic powers and breaks hexes. They are thought to shield the person who carries or wears them from evil people, theft, accidents, hexes and bad magic, negative spirits and nasty energy.
Historically the use of juniper berries goes back to at least ancient Egyptian times. They were also one of the earliest incenses used by Mediterranean witches. When the Black Death ravaged Europe, juniper was thought to be an effective protector. It was also considered to be a guardian of the veil between the worlds.