Soy sauce is very high in sodium, which is associated with an increased risk for high blood pressure and other cardiovascular problems. Two tablespoons of regular soy sauce typically contain more sodium than the recommended maximum daily intake, according to Men's Health.
However, soy sauce is an excellent source of antioxidants and amino acids, and it is also a good source of niacin and protein. It has a very high protein density, which means it supplies more protein in fewer calories than many meats, including lamb and salmon. Traditionally brewed soy sauce is usually considered healthier than brands manufactured with monosodium glutamate. Excessive soy sauce intake, as with all sodium, can be very harmful or even fatal to a person, according to NPR.org.