bicarbonate of soda is a quick fix for getting pH back to the correct range, but it is not a long term solution, because it introduces too much sodium into the body and those with heart disease, especially, will be putting their health at risk
For a long term solution take a calcium supplement, calcium carbonate. The carbonate cycle regulates the pH of the body.
The best calcium supplements are coral calcium (powdered coral) which have the natural balance of calcium and magnesium plus other trace minerals beneficial to overall health