Hey, we order from Penzy’s, but not the cinnamon. Acc to Wikipedia, the kind of cinnamon that works for diabetes type 2 is cinnamomum cassia. WalMart sells Rexall Cinnamon 500mg
North American sassafras is ALSO in the cinnamon family. It produces some known carcinogenic chemicals. So do all cinnamon species, however, in far smaller concentrations. Since I use so much cinnamon I make sure I never include lipids (cream, e.g.) in my coffee or tea ~ just plain cinnamon.
Do not be misled by statements such as "true cinnamon" ~ that's simply an early (circa 6000 BC) marketing technique.