Sophora X is a concentrated Sophora japonica extract standardised to contain a massive 95% Quercetin per capsule. Made from pure Sophora japonica without fillers, preservatives or additives and is freshly encapsulated for you at order or packaged as loose powder: the choice is yours.

Sophora's Quercetin is traditionally considered by Herbalists to be warm and drying, and has been a popular herb Worldwide for culinary and health use.

Quercetin Capsules

• 100 Capsules

• 400mg per capsule (380mg Quercetin) 

• 1 Capsule per serving 

• 100 servings

• 100% Sophora japonica Extract

• Standardised to 95% Quercetin

• No other ingredients of any kind

• Freshly encapsulated when you order

Quercetin Dosage

• Quercetin Capsules: 1 Capsule

• Quercetin Powder: 1/4 - 1/2 tsp

Serving Suggestion

Take one to two servings daily.

Caution

Generally, if you are pregnant, nursing, have any health condition or are taking any medications, it is recommended that you consult your health care professional before using herbs, including culinary herbs. In this case however: 

• • Gastrointestinal issues such as nausea, upset stomach, or diarrhea may occur at doses ≥500–1000 mg/day.

  • Headaches or tingling sensations can happen in some individuals at higher doses.

  • Kidney strain has been reported in rare cases with very high or prolonged dosing (gram-level daily intake).

  • Drug interactions may occur because quercetin can affect liver enzymes (CYP3A4, CYP2C19) and drug transporters, potentially altering medication levels.

  Medication Interactions (Use Caution)

  • Blood thinners (e.g., warfarin, apixaban): quercetin has mild antiplatelet effects.

  • Blood pressure medications: quercetin may mildly lower blood pressure, potentially enhancing effects.

  • Antibiotics (fluoroquinolones): quercetin may reduce their absorption.

  • Immunosuppressants (e.g., cyclosporine, tacrolimus): metabolism may be affected.

  Contraindications or Groups That Should Avoid or Use Only With Medical Supervision

  • Pregnancy or breastfeeding: safety is not well-established at supplemental doses.

  • Those with kidney disease: higher-dose quercetin may increase oxidative stress in kidneys.

  • People on multiple medications: due to enzyme interactions mentioned above.