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Apple cider vinegar has no evidence of kidney benefit — and undiluted or excessive use carries real risks: acid erosion of teeth, throat irritation, low potassium (hypokalemia), and worsened acidosis in CKD. In dialysis and advanced CKD, avoid regular use entirely.
No clinical trial shows ACV improves kidney function, dissolves stones, or 'cleanses' the kidneys — the claims are social-media folklore.
The documented harms matter more: chronic ACV use is associated with hypokalemia (low potassium — dangerous in CKD), low bone density, and esophageal irritation. In metabolic acidosis (common in CKD), adding acid is the wrong direction.
Practical rule: a teaspoon in water with food occasionally is unlikely to harm most people, but it's not medicine — and anyone with CKD, on potassium-affecting drugs, or on dialysis should skip it.
It depends on your kidney function
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