The FDA is issuing a warning over an ingredient commonly found in dietary supplements.
The stimulant is known as DMAA and is promoted as a natural way to enhance athletic performance and speed up weight loss.
According to the FDA, DMAA can cause increased blood pressure, shortness of breath, chest tightening, cardiovascular problems and even heart attacks.
The FDA has received a total of 86 illnesses and deaths associated with products containing DMAA.
