UK Anti-Doping cautions athletes and players in the UK to be aware of the prohibited substance 1, 3-dimethylbutylamine (DMBA) following its identification in a number of supplement products.
A recent study by Cohen and colleagues (2015) identified the presence of the stimulant in a range of supplements that are marketed to increase weight loss, enhance brain function, or to be used as a pre-workout supplement.
DMBA has a similar chemical structure to the prohibited and potentially dangerous stimulant methylhexaneamine and appears to be a replacement for methylhexaneamine in supplement formulations. A previous warning was issued in 2012.
Supplement manufacturers have been found to label products containing DMBA using one or more of the following names: AMP citrate, 1,3-dimethylbutylamine citrate, 4-amino-2-pentanamine, pentergy, 4-amino-2-methylpentane citrate, 4-AMP, 2-amino-4-methylpentane, and 4-methyl-2-pentanamine.
Athletes should avoid all products that contain this substance as its use could be detrimental to health and lead to an Anti-Doping Rule Violation (ADRV) following an In-Competition test. The safety of DMBA is also unknown since the stimulant has never been studied in humans.
All athletes are advised to be vigilant in using any supplement. No guarantee can be given that any particular supplement is free from prohibited substances.
You can reduce the risks by:
• undertaking thorough internet research
• only using batch-tested products
• checking on the Informed-Sport risk minimisation programme that a supplement has been batch tested
Further information and advice can be found on the UKAD supplements page.