Kikkoman Soy Sauce is naturally brewed like wine, from wheat, soybeans, water and salt, a process that takes months, allowing its rich, complex and mellow flavour to develop. Kikkoman Naturally Brewed Soy Sauce has no artificial colours, flavours, or preservatives. or added MSG and is non GM. Unlike some soy sauces which are chemically-made in a few days, Kikkoman Naturally Brewed Soy Sauce takes months to make, resulting in a rich, savoury taste.