Zero-added soy sauce means that harmful additives such as pigments, monosodium glutamate and preservatives are not added in the production process. Even sugar must be white sugar instead of saccharin! For example, I know that it is called "Happy Small Farmers Black Bean Soy Sauce" on the market, and their pigments are not added. Why? Because black beans themselves have certain melanin, they don't need to be added. The fermentation time is suitable, the taste is natural and delicious, and monosodium glutamate is not needed.