I’m reminded of the great cranberry scare from decades ago. It turned out that if you ate 3 boxcar loads that your chances of getting cancer would be increased. The scare was reported before Thanksgiving and the truth wasn’t revealed until way after New Years.
Exactly all this discussion of “parts per million” seems designed to obfuscate the threat level.
I suspect it’s another one of those cases where you would have to consume an entire container of cinnamon every day for years in order to be in any danger.
Whew! I lucked out again. I never eat more than 2 1/2 boxcar loads of cranberries in one sitting.
Unfortunately I do sprinkle it with 1/4 teaspoon of the worst cinnamon there is per boxcar load.