Bicarbonate Targets Did Not Benefit Kidney Disease
A randomized trial found no significant difference in eGFR decline between two serum bicarbonate treatment goals.
Updated on Oct. 10, 2026 in Nutrition
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A clinical study of 58 patients with chronic kidney disease found that targeting higher serum bicarbonate concentrations provided no clear benefit over lower targets. The research focused on whether different treatment strategies could slow the progression of kidney function decline.
Why it matters
Understanding if bicarbonate supplementation can effectively protect kidney health is vital for managing chronic conditions, as current treatment options are limited. This study indicates that more aggressive bicarbonate targets may not alter the trajectory of disease progression.
The study involved 58 randomized subjects, with 49 completing the 104-week follow-up. Participants in the intervention group received a median sodium bicarbonate dose of 6.7 grams per day.
The details
Researchers conducted an open-label trial comparing serum bicarbonate targets of 20 mmol/L and 24 mmol/L in patients with stage 3 to 4 chronic kidney disease. While 70 percent of participants successfully reached their assigned targets, the research identified no clinically meaningful difference in the rate of eGFR decline between the two groups.
Timeline
Mean difference in serum bicarbonate was measured at week 47.
The total duration of the study follow-up spanned 104 weeks.
Deeper Dive
This study contributes to the ongoing evolution of the KDIGO Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. It challenges the hypothesis that higher bicarbonate levels offer a therapeutic advantage in slowing function decline.
Patients currently managing chronic kidney disease should consult their healthcare providers before making changes to their bicarbonate supplementation routines. The study suggests that aggressive targeting of bicarbonate levels may not be necessary for preserving kidney function.
The takeaway
This trial underscores that intensifying medical interventions for kidney patients does not always lead to better clinical outcomes. Future care protocols should prioritize treatments that have been proven to significantly alter the progression of chronic kidney disease.
Further reading
Learn more about the latest findings in Nutrition research.
More information
Read the complete peer-reviewed research article regarding this trial.
Source note: This article includes information reported by Nature.
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