It seems like you can store honey indefinitely outside of the refrigerator. You’d think with the sugar content, moisture, and lack of acidity, mold would develop quickly but it doesn’t. What gives?
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Honey is naturally extremely acidic. It has a pH that falls between 3 and 4.5, approximately, and that acid will kill off almost anything that wants to grow there. So bacteria and spoil-ready organisms must look elsewhere for a home–the life expectancy inside of honey is just too low.
https://www.smithsonianmag.com/science-nature/the-science-behind-honeys-eternal-shelf-life-1218690/
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