Ge Gen (Pueraria lobata)

Ge Gen (Pueraria lobata) root is primarily a starchy tuber with a notable bioactive compound profile. Macronutrients: Carbohydrates are the dominant macronutrient, comprising approximately 70-80% of dry weight, predominantly as starch (pueraria starch, a fine-grained resistant starch with moderate glycemic impact). Protein content is relatively low at approximately 5-10% dry weight, containing essential amino acids including lysine and arginine. Fat content is minimal at less than 1% dry weight. Dietary fiber content is approximately 3-5% dry weight, supporting digestive health. Key Bioactive Compounds: Puerarin (pueraria isoflavone C-glucoside) is the most abundant and pharmacologically significant isoflavone, present at approximately 1-2% of dry root weight (10,000-20,000 mg/kg); it has moderate oral bioavailability enhanced by intestinal microbiota metabolism. Daidzein is present at approximately 0.5-1% dry weight and undergoes hepatic first-pass metabolism to equol in certain individuals. Daidzin (daidzein-7-O-glucoside) is present at approximately 0.3-0.8% dry weight. Formononetin is present in smaller quantities at approximately 0.01-0.05% dry weight. Kakkalide and irisolidone are minor isoflavones present at trace levels below 0.1% dry weight. Micronutrients: Calcium is present at approximately 90-100 mg per 100g dry weight. Potassium is present at approximately 900-1000 mg per 100g dry weight, contributing to cardiovascular support. Magnesium is present at approximately 35-45 mg per 100g dry weight. Iron is present at approximately 2-4 mg per 100g dry weight. Zinc is present at approximately 1-2 mg per 100g dry weight. B vitamins including B1 (thiamine) at approximately 0.1 mg/100g and B2 (riboflavin) at approximately 0.05 mg/100g are present in modest amounts. Bioavailability Notes: Puerarin has approximately 20-30% oral bioavailability due to its hydrophilic C-glucoside structure, which resists intestinal glucosidase hydrolysis; absorption occurs primarily through sodium-dependent glucose transporters. Daidzin bioavailability is enhanced by gut microbiota hydrolysis to daidzein and subsequent conversion to equol, which varies significantly between individuals (approximately 30-50% of populations are equol producers). Starch digestibility is moderate, with resistant starch fractions supporting prebiotic activity. Concurrent consumption with warm water or alcohol-based preparations (as in traditional decoctions) may enhance isoflavone extraction and absorption.