Food Additives
<p><b >Food additives</b> are substances added to food to preserve flavor or enhance its taste and appearance. Some additives have been used for centuries; for example, preserving food by <a href="http://en.wikipedia.org/wiki/Pickling" title="Pickling" >pickling</a> (with <a href="http://en.wikipedia.org/wiki/Vinegar" title="Vinegar" >vinegar</a>), <a href="http://en.wikipedia.org/wiki/Edible_salt" title="Edible salt" class="mw-redirect" >salting</a>, as with<a href="http://en.wikipedia.org/wiki/Bacon" title="Bacon" >bacon</a>, preserving <a href="http://en.wikipedia.org/wiki/Sweets" title="Sweets" class="mw-redirect" >sweets</a> or using <a href="http://en.wikipedia.org/wiki/Sulfur_dioxide" title="Sulfur dioxide" >sulfur dioxide</a> as in some <a href="http://en.wikipedia.org/wiki/Wine" title="Wine" >wines</a>. With the advent of processed foods in the second half of the 20th century, many more additives have been introduced, of both natural and artificial origin.</p>