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Classification: Moderate acidosis
Bicarbonate 18 is moderate acidosis — in CKD this level triggers treatment because acidosis accelerates kidney damage.
Bicarbonate is the body's main buffer — it neutralizes acids. Kidneys regenerate it; in CKD, acid accumulates and bicarbonate falls (metabolic acidosis).
Basic metabolic panel. Values below 22 indicate acidosis; below 18-20 in CKD usually warrants treatment.
Reference: KDIGO CKD guideline (metabolic acidosis section) • Normal range: 22-29 mEq/L
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.