Worcestershire sauce can be used as a substitute for soy sauce.Three tablespoons of Worcestershire and 1 tablespoon of water are equal to 1/4 cup soy sauce.
Equal parts of Tamari may also be used in place of soy sauce. This Japanese sauce is usually wheat free and darker in color, and tastes similar to soy sauce.
Soy sauce is high in sodium, so it might be necessary to add salt to substitutes. Low-sodium sauces are also available.
Soy sauce is created by boiling soy beans and barley or wheat. The sauce is commonly used in a variety of Asian dishes and is low in calories and fat.