When sealed in an airtight container, honey is one of the few foods known to have an eternal shelf life. There are even reports of edible honey being found in several-thousand-year-old Egyptian tombs. Honey’s longevity can be explained by its chemical makeup: The substance is naturally acidic and low in moisture, making it an inhospitable environment for bacteria.
A lot of hard work from bees goes into imbuing honey with these magical properties. While transforming nectar (honey’s main ingredient) into honey, bees flap their wings so hard that they draw excess moisture out of the initially water-filled substance. Bees also have a special enzyme in their stomachs that helps to break the nectar down into gluconic acid and hydrogen peroxide, the latter of which acts to further prevent the growth of bacteria and other organisms in the honey.