Among the other benefits, sodium-ion batteries perform better than lithium-ion batteries in extreme cold. CATL has said its new battery works in temperatures as low as -40° Fahrenheit.

A low sodium diet could be life-saving for people with conditions like high blood pressure. The low sodium diet is recommended for people with heart disease, high blood pressure and kidney disease.

DEAR DR. ROACH: My wife and I both have chronically low blood sodium levels, mostly around 132, but sometimes lower. It never reaches 135. This is of concern because sodium is essential for cell ...