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ST. JOHN'S WORT
COMMON NAME : St. John's Wort, Goatweed Hypericum, Klamath weed
LATIN NAME : Hypericum perforatum
ACTIVE SUBSTANCES : Glycosides (hypericin, pseudohypericin), flavonoids, tannins
DESCRIPTION : St. John's wort is a perennial with regular flowers which bloom from June until September. The plant was believed , from the time of the ancient Greeks until the Middle Ages, to ward off witchcraft and evil spirits and to drive out devils. Considered a noxious weed by farmers due to its photosensitizing effect on livestock, St. John's wort has nevertheless been used by humans for centuries for a wide variety of ailments, including nervous disorders, depression, neuralgia, wounds and burns, kidney problems, and for its anti-bacterial and anti-inflammatory actions.
PHYSIOLOGY : St. John's wort contains a variety of active ingredients including dianthrone derivatives (hypericin and pseudohypericin), flavonoids and tannins (hyperoside, quercetin, rutin, catechin), xanthrones, monoterpenes and sesquiterpenes, and phytosterols (beta-sitosterol). Xanthrones and hypericin have been shown to have monoamine-oxidase (MAO)-inhibiting activity. A standard treatment for depression uses MAO inhibitors to retard the breakdown of neurotransmitters such as norepinephrine and serotonin and thus increase their concentration in the central nervous system. A clinical trial involving standardized hypericin extract showed improvement in depressive symptoms, including anxiety, apathy, insomnia, depression, and feelings of worthlessness. The flavonoids and possibly other agents have wound healing and anti-inflammatory activities. Most current research has focused on the antiviral activity of the anthroquinones, hypericin and pseudohypericin. Hypericin is a photodynamic red pigment whose anti-viral activity is substantially enhanced by exposure to light. The mechanism is thought to involve the production of oxygen free-redicals which can damage the viral envelope. Non-enveloped viruses such as polio or adenovirus are unaffected by hypericin. The human studies involved taking high doses of hypericin (10 mg) extracted from St. John's wort.
ACTIVE PROPERTIES : St. John's wort has been used for centuries to calm the nerves and treat depression. A vivid red oil made from macerating the flowers in vegetable oil has been used to dress wounds, heal deep cuts, soothe burns and ease the pain of neuralgias. Taken internally, the oil has been used for ulcers and gastritis. An infusion of the herb has also been used as an expectorant for bronchitis and as a diuretic for the kidneys and as an easing agent for menstrual cramps.
DIRECTIONS FOR USE : 250 mg. extract / day
TOXICITY, CAUTIONS & CONTRA-INDICATIONS : Consumption of hypericin may render the skin photosensitive. Care should be taken during exposure to sunlight. Avoid excessive expo sure to sunlight, tanning lights or UV sources.
