An increased AST level is usually a sign of liver disease. Liver disease is even more likely when the levels of substances checked by other liver blood tests have also increased. An increased AST level may be due to any of the following:
In order to keep itself fresh, the lettuce gives off carbon dioxide, causing a slight odour. This carbon dioxide is not harmful and the odour should disappear quickly once the salad package is opened.
Ad. 2. Learn common preservative names. Although there are hundreds of food additives that function as preservatives, some of the most common appear in a wide variety of foods. 1  Once you learn to identify common preservatives you can quickly avoid selecting foods with those preservatives in the future. Once you learn to identify common preservatives you can quickly avoid selecting foods with those preservatives in the future. 2  Some of the most common preservatives include citric acid, sulfur dioxide, ascorbic acid, propionic acid, nitrates and nitrites, sodium bisulfite, sulfites, and even formaldehyde.