Subway is removing azodicarbonamide from its bread ; other chemicals remain . There are seven chemical compounds approved by the FDA for use in foods . Endocrine disruptors can lead to developmental , reproductive and/or neurological problems , according to the National Institutes of Health , including fertility issues and an increased risk of some cancers . Propyl gallate , BHA and BHT are used to preserve oily products such as oils . Silicon dioxide is used in coffee filters , dried soups and insect repellent .
Subway is removing azodicarbonamide from its bread ; other chemicals remain . There are seven chemical compounds approved by the FDA for use in foods . Propyl gallate , BHA and BHT are used to preserve oily products such as oils . Silicon dioxide is used in coffee filters , dried soups and insect repellent .