How does sodium bicarbonate help the kidneys?

Neutralizes acidity. Sodium bicarbonate (sodium bicarbonate) makes the urine less acidic. This effect helps the kidneys get rid of uric acid, thus helping to prevent gout and kidney stones. It can help the body get rid of excess amounts of certain types of medications. Bicarbonate (sodium bicarbonate) can also help prevent and treat certain metabolic problems (acidosis) caused by kidney disease.