A few additives and preservatives can affect non-allergic people. Some of these substances cause more reactions than other. For example, reactions to sulphur dioxide and sodium benzoate occur more commonly in asthmatics than reactions to the colourant tartrazine. We cannot hope to cover all the additives and preservatives that may result in reactions, but these are some of the more important ones. Preservatives Sulphur dioxide and sodium benzoate often cause tight chests in individuals who have asthma.
Many people also complain of a scratchy feeling at the back of their throats.
Although these are the common reactions, others such as rashes may also occur. Sulphur dioxide may be labelled as sodium metabisulphite, potassium metabisulphite, sodium or potassium bisulphite or sulphite. Some fruit juices, concentrated soft drinks, dried fruit, boerewors, dried wors, wine, beer, some sauces, pickles, hamburger patties. Colourants Colourants may be natural or synthetic. Reactions, although not common, can occur with both types.