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.
There is a wide variety of food preservatives used by cooks and food manufacturers to extend shelf life and improve storage of both cooked and raw foods. Many natural preservatives, like salt and sugar, are often used in preserving canned fruits, processed meats as well as various types of canned or jarred vegetables.