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.
Years ago, lettuce and raw vegetables at salad bars were dipped in a sulfite solution to keep them from turning brown. This is no longer legal because the FDA banned the use of sulfites on fresh fruits and vegetables in 1986.alad bar lettuce should be safe, but other salad ingredients, such as shrimp, might cause trouble. Some salad dressings contain sulfites, and so do dried fruits like apricots or golden raisins.