Soy sauce can be added directly to food and is used as a dip or salt flavor in cooking. Soy sauce is a salty liquid condiment traditionally produced by fermenting soybeans and wheat. The four basic ingredients in soy sauce are soybeans, wheat, salt, and fermenting agents like mold or yeast. Soy sauce is high in sodium, commonly known as salt, which is an essential nutrient that your body requires to function properly. Consume soy sauce moderately.