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.
But companies that label their products natural or organic must use natural sources of the preservatives. They usually employ celery powder or celery juice, which are high in nitrate. A bacterial culture is used to convert that to nitrite. The resulting chemicals are virtually identical to their synthetic cousins.