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.

A fitness and caffeine enthusiast died at the age of 28 from a heart attack — her devastated mother believes energy drinks are to blame. Florida teacher Katie Donnell was committed to a healthy ...

A 28-year-old “workout queen” who fueled her gym visits with caffeine supplements and energy drinks died of a heart attack — and her mother believes it’s because of the beverages.

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 ...