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.
Food preservatives are substances that are added to food items in order to inhibit, retard or arrest the process of fermentation, acidification, and decomposition of food items. Or, in other words, preservatives in food help keep the food safe, without spoiling, for longer.