Researchers tracked years of data, noting that strokes and other neurological adverse events reduce a patient's odds of survival.  

The product at the heart of this recall is a dietary supplement taken to boost energy and performance when exercising. The FDA previously warned the public not to take it due to the potential side effects. 

"We really should have a system that is patient-centric, physician-led, and professionally managed, but in a cost-effective way," Rick Snyder, MD, said.