Katie Donnell, 28, was a “workout queen” who was “the epitome of health” until she died of a shocking heart attack — and her mother believes energy drinks are to blame.

She took a caffeine supplement before hitting the gym. “At 28, you just don’t see people dropping dead of a heart attack,” Donnell’s mother, Lori Barranon, recently told Kennedy News & Media.

Katie Donnell, 28, was a "workout queen" who was "the epitome of health" until she died of a shocking heart attack — and her mother believes energy drinks are to blame.

Katie Donnell, 28, was a "workout queen" who died of a shocking heart attack -- her mother believes it was a caffeine overdose and energy drinks are to blame. A fitness and caffeine enthusiast died at ...