H

Scientific name	Name	Description	Picture
Hamamelis virginiana	Common witch-hazel	It produces a specific kind of tannins called hamamelitannins. One of those substances displays a specific cytotoxic activity against colon cancer cells.
Hippophae rhamnoides	Sea buckthorn	The leaves are used as herbal medicine to alleviate cough and fever, pain, and general gastrointestinal disorders as well as to cure dermatologic disorders. Similarly, the fruit juice and oils can be used in the treatment of liver disease, gastrointestinal disorders, chronic wounds or other dermatological disorders.
Hoodia gordonii	Hoodia	The plant is traditionally used by Kalahari San (Bushmen) to reduce hunger and thirst. It is currently marketed as an appetite suppressant.
Hydrastis canadensis	Goldenseal	It was used traditionally by Native Americans to treat skin diseases, ulcers, and gonorrhea. More recently, the herb has been used to treat the respiratory tract and a number of other infections.
Hypericum perforatum	St. John's wort	Widely used within herbalism for depression. Evaluated for use as an antidepressant, but with ambiguous results.
Hyssopus officinalis	Hyssop	It is used for digestive and intestinal problems including liver and gallbladder conditions, intestinal pain, intestinal gas, colic, and loss of appetite. It is also used for respiratory problems including coughs, the common cold, respiratory infections, sore throat, and asthma.