Surprisingly DMAA was found to be naturally present in certain Geranium species. 1,3-DMAA, 1,4-DMAA, and 2-aminoheptane were detected, parts per billion though. Chemical structures - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3512447/figure/f1-aci-7-2012-059/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3682735/