In terms of stress relief, camphor (Cinnamomum camphora) is used in aromatherapy to calm and open the mind.¹ Considered likely safe for adults in low concentrations when inhaled or applied topically, camphor is from the leaves, twigs, or bark of the evergreen camphor tree. ^77-78 In the U.S. it is grown in Florida, but it is native to China and Japan.⁷⁸ Do not use concentrations of over 11% strength topically, and the American Academy of Pediatrics recommends not using at all with children.⁷⁷