Baking Soda for Urinary Tract Health

Research suggests that sodium bicarbonate (baking soda) may support urinary tract health primarily by alkalinizing urine, a property that studies indicate can help dissolve or prevent certain types of kidney stones — including those formed from uric acid, cystine, and xanthine — and may aid in clearing nephrotoxic substances like uranium from the kidneys in animal models. The available evidence includes one randomized controlled trial, several narrative and systematic reviews, a case report, and one animal study, with findings generally pointing in a supportive direction; however, the human clinical research is largely focused on specific medical conditions such as gout, cystinuria, and rare enzyme deficiencies rather than general urinary tract health in healthy individuals. One comparative trial found that sodium bicarbonate raised urine pH and lowered uric acid levels similarly to other alkalinizing agents, but was associated with more gout flares than a tart cherry citrate mixture and standard citrate, suggesting it may not be the preferred option in all contexts. Notably, a study on alkaline water — a commercially marketed alternative — found it delivered negligible therapeutic alkali compared to prescribed treatments, underscoring that the benefit attributed to baking soda appears to depend heavily on the actual amount of alkali delivered, and that most of the supporting evidence comes from populations with diagnosed medical conditions rather than the general public.