Chanca piedra (Phyllanthus niruri)

Tier 3 — weak evidence · Kidney stones · Liver · Urinary

A tropical herb traditionally used across South America and Ayurveda for kidney stones (the name means 'stone breaker' in Spanish) and liver support. Contains lignans, flavonoids, and alkaloids that inhibit calcium oxalate crystal aggregation and relax ureteral smooth muscle. Small RCTs suggest reduced stone recurrence and aid in passing existing stones. Also traditionally used for hepatitis B (evidence mixed). Generally well-tolerated but may lower blood sugar and blood pressure.

Dose: 500 mg standardised extract 2–3 times daily, or 1–2 g dried herb as infusion