Bicarbonates are naturally produced in the body and their role is to serve as a buffering agent. A buffering agent reduces acidity in the body, which means it helps the pH balance. Too many acids in the body makes one weak since they act as poisons. Bicarbonates are created from the alkaline minerals such as sodium, potassium and magnesium. Sodium bicarbonate (baking soda) is known as donator of alkalinity.
An article published in a medical journal has found that low bicarbonate levels increased the risk of death in older patients. https://www.sciencedaily.com/releases/2016/01/160114214029.htm
Here is another source for bicarbonate informationhttp://mgwater.com/bicarb.shtml
Magnesium plays one of the most critical roles in the human body which includes bicarbonate production.