Jane says she does not use any preservative chemicals in her products, so they only last about two or three weeks.
VOA: special.2010.02.17
Last year, the drug industry demanded and won protection from litigation over the use of thimerosal, a preservative in most vaccines believed by some to cause autism.
The same analysis warns of the difficulties of attaining an even dispersal of salt in bacon, and the impact of laws restricting the use of nitrates as a preservative.