If you come across a restaurant using wheat-based soy sauce in a meal marked gluten-free, please share the information below with the manager. A pdf of the letter is available here.
Dear restaurant manager,
It has come to our attention
that your restaurant is using certain sauces, including shoyu soy sauce and
representing these sauces as gluten-free to your patrons. Under the FDA's
gluten-free labeling rule, wheat-based soy sauces and sauces
containing wheat-based soy sauce as an ingredient may NOT
be labeled gluten-free. According to the FDA, “If a soy sauce is made from