Author Affiliation: Department of Medicine, Cambridge Health Alliance and Harvard Medical School, Cambridge, Massachusetts.
Rodricks and Lumpkin argue that 1,3-dimethylamylamine (DMAA) does not possess amphetamine-like effects, is found in geranium, and has been documented to be safe. These are all inaccurate characterizations of the literature.
DMAA is a pharmaceutical patented by Eli Lilly & Co to possess the desirable properties of both ephedrine and amphetamine. An indirect sympathomimetic amine, DMAA has both vasoconstrictive properties and cardiovascular effects.
Cohen PA. DMAA as a Dietary Ingredient—Reply. JAMA Intern Med. 2013;173(7):594-595. doi:10.1001/jamainternmed.2013.3776