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Thermoworks routinely has 20-30% off sales. I have an inkbird as well. I do check calibration on mine on a regular basis. The inkbird is sealed so you can replace the battery unlike the Thermopen.
https://microbiologyjournal.org/bacteriocin-producing-bacteria-isolated-from-turkish-traditional-sausage-samples/
Bacteriocin Producing Bacteria Isolated from Turkish Traditional Sausage Samples
The actual grant application https://cris.nifa.usda.gov/cgi-bin/starfinder/0?path=fastlink1.txt&id=anon&pass=&search=R=94915&format=WEBLINK
https://phys.org/news/2023-02-texas-meat-scientist-nitrite-added-meats.html
The one sausage study had not true control (i.e. sausage made with no cure of any type). After all folks had been making sausage for hundreds of years before nitrate/nitrite cures were discovered.
One has yet to determine are these polyphenols in high concentrations harmful.