Beware of DMAA in supplements

If you take supplements that contain dimethylamylamine (DMAA), you should know that Food and Drug Administration questions the chemical’s safety.

FDA in April 2012 issued warning letters to 10 manufacturers of dietary supplements that contain the chemical for failing to provide any evidence of the product’s safety for consumers.

FDA says the chemical can narrow blood vessels, which can lead to a heart attack.

DMAA typically is found in dietary supplements that are used to reduce weight or gain muscle. The chemical typically is listed on the supplement’s packaging, although if it isn’t listed under its chemical name, it might be listed as geranium oil.