DMAA, is an ingredient black flagged by the U.S. Food and Drug Administration. It is most often found in pre-workout supplements. Although DMAA has been on the World Anti-Doping Agency’s (WADA) list of banned substances since 2010, various countries’ supplement-regulating bodies have been slower to respond to the situation.
If you use this types of supplements, think again:
The FDA is concerned about a lack of data on the safety of DMAA. However, there are still products being sold that have DMAA as one of their ingredients.
“Several documented cases of severe negative effects to the heart and the brain indicate that consumption of DMAA , especially in combination with caffeine, pose a significant risk to health” is indicated in a warning issued by Malta government.