The maidenhair herb is a delicate plant with thin leaves. It is common in almost all the world and in Greece was used as a herb for treating cough. The maidenhair was used as a stimulant of hair. In modern herbal medicine, the maidenhair is mainly used to treat respiratory problems such as common cold, cough, bronchitis, asthma and flu. It is basically a substance that protects the pituitary glands of the human body from irritation and inflammation. Also, maidenhair contains rutin (a flavonoid) having strong anti-inflammatory action.