Radix Puerariae (Ge Gen) – also known as Kudzu Root, Cam Ge Gen, or Bai Ge Gen – is the root of Pueraria lobata (Willd.) Ohwi, a precious herb in Traditional Chinese Medicine. With a sweet and acrid flavor, neutral nature, entering the Spleen, Stomach, Lung, and Bladder meridians, Ge Gen is widely used to clear heat, release the exterior, promote body fluids, relieve muscle tension, stop diarrhea, and detoxify alcohol. Modern studies have confirmed that its bioactive compounds—Puerarin, Daidzein, and Genistein—exhibit vasodilatory, anti-inflammatory, antioxidant, and hepatoprotective properties. Ge Gen helps improve cerebral and coronary circulation, supporting the treatment of hypertension, diabetes, hyperlipidemia, and menopausal symptoms. Traditionally, it is also valued for its ability to relieve fever, reduce thirst, and alleviate gastrointestinal disorders. In folk medicine, Kudzu starch drink made from Ge Gen is used as a cooling, detoxifying, and beautifying tonic, helping to soothe the liver and nourish the body. With its broad range of therapeutic effects and modern scientific backing, Ge Gen (Radix Puerariae) stands as a key medicinal herb in both classical formulas and modern health applications, balancing tradition and evidence-based wellness.
HERBAL NAME: Ge Gen (Radix Puerariae) - Kudzu Root
Common English Name: Kudzu Root
Scientific Name: Pueraria lobata (Willd.) Ohwi (Radix Puerariae)
Family: Fabaceae (Leguminosae).
Storage: Easily susceptible to moisture and insects; should be kept tightly sealed in a cool, dry, well-ventilated place.
Properties and Meridians:
Taste and Nature: Sweet, acrid, neutral to slightly cool, non-toxic.
Meridian Tropism: Bladder, Spleen, Stomach, and Lung meridians.
Therapeutic Functions:
According to Traditional Chinese Medicine, Ge Gen (Radix Puerariae) clears heat, relieves restlessness, promotes eruption, releases the exterior, generates body fluids, stops diarrhea, relaxes muscles, alleviates spasms, quenches thirst, detoxifies alcohol, guides herbs into the Yangming meridian, nourishes the stomach, raises Yang Qi, and tonifies Spleen Qi.
It is indicated for conditions such as exterior heat syndrome, common cold, headache, fever, or measles that fail to erupt completely or appear at early stages; persistent fever with muscle tension.
Used for vomiting (often combined with fresh ginger), intestinal spasms, abdominal pain, diarrhea, and damp-heat dysentery. Also useful for Taiyang syndrome with mistaken purgation causing diarrhea with heat. Helps nourish the stomach, reduce gastric heat due to spicy or excessive food intake, relieve gastritis or gastric ulcer accompanied by toothache and halitosis.
Detoxifies alcohol (fresh root crushed for juice), measles toxins, and mitigates adverse drug reactions or overdose.
Relieves numbness of the legs, osteoarthritis, and cervical spondylosis. Treats rigidity of the neck and upper back, or combined Taiyang–Yangming disorders with stiffness of the nape.
Used for metal-related trauma and stroke.
Indicated for internal heat syndromes such as hematemesis, epistaxis, and mental agitation.
Modern pharmacological studies show that Ge Gen increases coronary and cerebral blood flow in patients with atherosclerosis, enhances circulation to the brain and heart, reduces myocardial and cerebral ischemia, treats hypertension and migraine, and helps lower blood glucose and lipid levels.
When combined with decoctions and vitamin B, it may support treatment of non-congenital sudden hearing loss.
It enhances uterine function, regulates hormones, and supports women during menopause.
Chemical Constituents:
Flavonoids & Isoflavonoids:
Puerarin, Daidzin, Daidzein, Genistein, 4′-Methoxy-Puerarin, Formononetin, 7-Diglucoside, Xyloside.
→ Main active group; vasodilatory effect, increases cerebral and coronary blood flow, lowers blood sugar and lipid levels, regulates phytoestrogen activity.
Organic Acids & Fatty Acids:
Arachidic acid, Linoleic acid, Palmitic acid.
→ Support lipid metabolism, protect liver, and possess antioxidant properties.
Sterols & Triterpenoids:
β-Sitosterol, Stigmasterol, Campesterol, Lupeol, Betulinic acid.
→ Lower cholesterol, anti-inflammatory, antioxidant, and hepatoprotective effects.
Starch & Natural Sugars:
Starch (10–15%), Glucose, Sucrose.
→ Provide energy, promote fluid generation, relieve thirst, and strengthen Stomach Qi.
Amino Acids:
Lysine, Arginine, Aspartic acid, Proline, Valine, Leucine.
→ Nourish the body, restore energy, and aid muscular metabolism.
Minerals & Vitamins:
Calcium, Phosphorus, Iron, Vitamin A, Vitamin C, Vitamin B1 (Thiamine), Vitamin B2 (Riboflavin), Niacin.
→ Enhance immunity, protect vascular integrity, and improve cerebral and circulatory functions.
Dosage and Administration:
Usual dose: 4–12 g per day, mainly used as decoction or fresh juice.
Contraindications and Precautions:
Beyond its therapeutic value, Kudzu (Pueraria montana var. lobata) has notable ecological effects, including both benefits and environmental risks:
Kudzu provides medicinal value and functions such as nitrogen fixation and ground cover, but also poses significant risks to biodiversity. Its use requires strict ecological management.
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