Phosphoric acid (urinary)

Tier 4 — risky / avoid · Kidney stones · Urinary acidification

Sometimes used in folk medicine to dissolve calcium-based kidney stones, but no clinical trial supports this claim. Excess phosphoric acid disrupts calcium-phosphorus balance and may actually increase kidney stone risk. Not recommended as a supplement by any medical authority. If you have kidney stones, consult a urologist for evidence-based treatment options.

Dose: No evidence-based dose; may worsen kidney stone risk — not recommended as a supplement