@nursefrombirth FWIW I recommend cinnamon from Penzey's. It's affordable, potent, and they have thorough quality assurance. Not associated, just impressed.
"...Our spices are tested for heavy metals As,Cd,Hg,Pb by labs accredited ISO 17025 using ICR-MS / ICP-OES. This ensures that our products are within normal ranges and meet regulatory requirements. Heavy metals can occur naturally in soil and farmers, producers, and suppliers are all working to be as close to zero as possible."
@b4cks4w @nursefrombirth Penzey's is a very responsible company, and they have such variety!