As a preservative
<p><b ><a href="http://en.wikipedia.org/wiki/Evaporated_milk#cite_ref-0" ></a></b> <a rel="nofollow" class="external text" href="http://sciencefocus.com/qa/how-does-sugar-act-preservative" >"How does sugar act as a preservative?"</a>. BBC Worldwide.
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