Fortified soy sauce is a type of soy sauce that has been enriched with additional nutrients and flavors. It is made by fermenting soybeans and wheat, then adding various ingredients such as vitamins, minerals, and sometimes even alcohol. This process enhances the taste and nutritional value of the sauce, making it a popular choice for cooking and seasoning. Fortified soy sauce is commonly used in Asian cuisine and can be found in many dishes, including stir-fries, marinades, and dipping sauces.