FDA has issued a final rule to establish compliance requirements for fermented and hydrolyzed foods that bear the gluten-free claim. The rule pertains to foods such as soy sauce, yogurt, sauerkraut, pickles, cheese and green olives. FDA has issued a final rule to establish compliance requirements for fermented and hydrolyzed foods that bear the gluten-free claim. The rule pertains to foods such as soy sauce, yogurt, sauerkraut, pickles, cheese and green olives.