Eden Apothecary · Herb Profile
Pueraria lobata
Pronounced Kudzu: KUD-zoo. Ge Gen: guh-GUN (Chinese ge gen). Pueraria lobata: pyoo-eh-RAIR-ee-ah loh-BAH-tah.
Cool, moist, and outward-releasing: a sweet, acrid relaxant that softens the heat-bound, stiff muscle layer of the neck and shoulders while generating fluids to quench thirst.
Avoid medicinal doses. Reliable human safety data in pregnancy are lacking, and the isoflavones (puerarin, daidzein, genistein) are phytoestrogenic and bind estrogen receptors, a theoretical reproductive concern. Professional references (Natural Medicines / Drugs.com Professional monograph; NCCIH; MSKCC About Herbs) state that safety and efficacy in pregnancy have not been established and advise against use. Culinary kudzu starch as a food is a separate, low-concern matter; concentrated root extracts should be avoided. Source: Natural Medicines Comprehensive Database; NCCIH; MSKCC Integrative Medicine (About Herbs: Kudzu).
Avoid medicinal doses; insufficient data. There is no established lactation safety record, and the phytoestrogenic isoflavones pass the same theoretical concern to the nursing infant. No LactMed entry establishes safety. Prefer to avoid concentrated kudzu root extracts while breastfeeding. Source: Natural Medicines Comprehensive Database; NCCIH.
No established pediatric dosing for medicinal extracts and insufficient safety data; avoid concentrated isoflavone or puerarin preparations in children except under professional guidance. Kudzu starch used as an ordinary food (an arrowroot-like thickener) is a separate, low-concern matter. Source: Natural Medicines Comprehensive Database; AHPA Botanical Safety Handbook.
Generally very well tolerated and close to a food. Large doses of the raw, dispersing root can provoke light sweating, and its upbearing nature may cause fullness, distension, or lightheadedness in yin-deficient or sensitive people. The isoflavones (puerarin, daidzin, daidzein) are phytoestrogenic and also inhibit aldehyde dehydrogenase-2 (ALDH2), which can raise acetaldehyde. Rare case reports describe acute interstitial nephritis after about ten days of kudzu root juice and reversible liver-enzyme elevation. Concentrated puerarin injections used in Chinese hospitals have caused occasional hemolysis and are not a home preparation.
Estrogen-sensitive (estrogen-receptor-positive) conditions and cancers, and concurrent tamoxifen or hormone therapy, because the isoflavones are phytoestrogenic. Known hypersensitivity to kudzu. Use caution with methotrexate, antidiabetic drugs, antihypertensives, and anticoagulant or antiplatelet drugs (see Drug Interactions). In the traditional frame, exterior deficiency with profuse sweating and cold of the Spleen and Stomach without heat.
No conservation concern. Kudzu is one of the world's most aggressive invasive weeds, notorious across the southeastern United States and listed as noxious or invasive in the United States, South Africa, Australia, and elsewhere. It is not on any United Plant Savers at-risk list. Harvesting wild kudzu root is ecologically beneficial; never plant or propagate it. Source root from cultivated stock or from wild invasive stands being cleared.
Not in the canonical biblical texts and unknown to the ancient Mediterranean materia medica (Dioscorides, Pliny). Native to East Asia; first recorded in the Han-dynasty Shennong Ben Cao Jing and used in Han-era formulas of the Shang Han Lun. Introduced to North America at the 1876 Philadelphia Centennial Exposition, where it later became the infamous invasive vine of the American Southeast, the vine that ate the South.
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