The Tell-Tale Signs Your Beef Jerky Has Gone Bad - Tasting Table
Briefly

"Before the days of refrigeration, preserving your meat by methods such as drying, salting, or smoking was the only way to keep meat edible beyond its very short shelf life."
"Once you've opened it, expect it to last just a few days on the shelf, or up to two weeks in the fridge."
"If the jerky looks, smells, and feels fine, the last test is the taste test. Beef jerky should taste meaty and smoky, and any sour or unpleasant taste is a sign it is spoiled."
"Keeping your beef jerky fresh and tasty means keeping it away from the two things that will cause it to turn bad: Oxygen and moisture."
Read at Tasting Table
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