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Hypericum perforatum - Klamath Weed
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The common name "St John's wort" may be used to refer to any species of the genus Hypericum. Therefore, Hypericum perforatum is sometimes called "common St John's wort" or "perforate St John's wort" in order to differentiate it.
Studies have supported the efficacy of St John's wort as a treatment for depression in humans
