Is it possible for essential oils, primarily cinnamon, to contain nickel?
OK, here goes. Do you want the simple one first? Yes, it can.
As with any plant if it is in the soil then it will likely be in the plant. Since Nickel is way under the 300 magic number of weight, then it would come over. You won't likely find the Nickel coming up in a GC/MS report. #1- they don't test for it and #2- the scan isn't sensitive to pick it up as a general rule, even if they were watching for it.
Now the longer part; There is a lot of research out there with respect to animal applications and very little with human applications. But some things are known, one is that the combination of the Nickel with Cinnamon tends to be absorbed in the large intestine. This is one of the very few EO's that can be utilized by oral administration effectively. Now don't go out there and drink Cinnamon EO, it doesn't quite work that way. I...