The Elder tree has been used medicinally for centuries throughout Europe. The oldest claim is perhaps its use by the Romans, who, among a variety of medicinal uses, used it to dye hair black. It has been common to eat the flowers or berries; make wine or syrup from the berries; make tea from the leaves, flowers, or inner bark; rub the bruised leaves on the skin; and make tea or tincture from the inner bark.
Yarrow has an ancient relationship with mankind, and has many uses, but yarrow's main effect and what it is most famous for is its ability to aid in the healing of wounds. Yarrow also helps with circulation, aiding in breaking fevers by causing sweating, and aiding in digestion.