While MSG is not a complete sodium replacement, it may be good to use for those on low sodium diets, like those with chronic kidney disease. MSG stands for monosodium glutamate, and glutamate is already present in some levels in your food and in your body. Many studies have shown that by using MSG as a replacement for table salt, people showed a decrease in overall sodium in their diets. So, while it is not the healthiest replacement, it does add flavor while reducing the sodium intake in comparison with those who use table salt to season.