Metabolic Acidosis in CKD: A Review of Recent Findings

Michal L. Melamed, Kalani L. Raphael

Research output: Contribution to journalReview articlepeer-review

17 Scopus citations


Metabolic acidosis is fairly common in patients with chronic kidney disease (CKD). The prevalence of metabolic acidosis increases with worsening kidney function and is observed in ∼40% of those with stage 4 CKD. For the past 2 decades, clinical practice guidelines have suggested treatment of metabolic acidosis to counterbalance adverse effects of metabolic acidosis on bone and muscle. Studies in animal models of CKD also demonstrated that metabolic acidosis causes kidney fibrosis. During the past decade, results from observational studies identified associations between metabolic acidosis and adverse kidney outcomes, and results from interventional studies support the hypothesis that treating metabolic acidosis with sodium bicarbonate preserves kidney function. However, convincing data from large-scale, double-blinded, placebo-controlled, randomized trials have been lacking. This review discusses findings from recent interventional trials of alkali therapy in CKD and new findings linking metabolic acidosis with cardiovascular disease in adults and CKD progression in children. Finally, a novel agent that treats metabolic acidosis in patients with CKD by binding hydrochloric acid in the gastrointestinal tract is discussed.

Original languageEnglish (US)
Pages (from-to)267-277
Number of pages11
JournalKidney Medicine
Issue number2
StatePublished - Mar 1 2021


  • bicarbonate
  • chronic kidney disease
  • end-stage kidney disease
  • interventional trials
  • metabolic acidosis
  • observational studies
  • sodium bicarbonate
  • total CO
  • veverimer

ASJC Scopus subject areas

  • Internal Medicine
  • Nephrology


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