Fitness Star's untimely death at 28: Mother issues a heartfelt warning after heart attack
Katie Donnell, a dedicated fitness lover, died after suffering a heart attack, potentially linked to her heavy caffeine and energy drink consumption.

A 28-year-old fitness enthusiast from Florida recently faced a heartbreaking tragedy, leaving her family and friends devastated. Her passing has raised concerns over the impact of everyday substances that many consider harmless.
The incident, which occurred after a health-related event, has led to a broader conversation about lifestyle choices and the risks that may go unnoticed until it’s too late. As the story unfolds, it reveals alarming insights into health, fitness, and the importance of monitoring even the most common habits.
Katie Donnell, fitness Florida teacher, tragically passed away
Katie Donnell, a 28-year-old fitness enthusiast and Florida teacher, tragically passed away after suffering a heart attack. Her mother, Lori Barranon, believes that her daughter's high intake of energy drinks and caffeine supplements contributed to her death.
Donnell consumed up to three energy drinks a day in addition to coffee, and would take a caffeine supplement before workouts. "She thought it would help her exercise and give her more energy. She worked full-time, studied, and exercised. She got used to that pace," Barranon explained to Daily Mail.
In August 2021, while hanging out with friends, Katie suddenly fainted. "They thought it was a stroke, but she was actually having a heart attack," her mother shared.
The paramedics were unable to intubate her in time, causing brain damage. After three hours of attempts to revive her, she was placed in a medically induced coma.
Her body began to fail, and after ten days, the family made the difficult decision to disconnect her from life support. Initially, doctors thought she had been drugged, as it is uncommon for someone so young to experience a sudden heart attack.
Barranon didn’t realize the extent of her daughter’s caffeine consumption until after her death. "Her boyfriend told me she’d buy a four-pack of drinks every two or three days, on top of all the coffee she was drinking. When I cleaned out her car, I found several empty cans," she recalled.
According to the National Library of Medicine, caffeine can affect the heart by raising blood pressure and increasing the risk of arrhythmias.
While the specific brand of energy drinks Donnell consumed wasn’t disclosed, some cans contain up to 200 mg of caffeine per serving. The Mayo Clinic indicates that up to 400 mg per day is a safe amount, but Barranon believes that her daughter’s intake contributed to her health problems.
Now, Barranon warns others about the dangers of these products. "She was a fitness queen, ate healthy, was the epitome of health, but she had anxiety, which I believe was from the caffeine," she explained.
“If you don’t keep your kids away from these things, you could end up in my situation. They’re dangerous and can be deadly. I tell everyone I see with energy drinks that this can happen in the blink of an eye,” she added.
Why heart attacks happen and how to identify them
A heart attack, or myocardial infarction, occurs when blood flow to the heart is blocked. This is typically caused by plaque buildup in the coronary arteries, restricting or halting the oxygen supply to the heart muscle. According to MedlinePlus, risk factors include high blood pressure, high cholesterol, smoking, diabetes, and obesity.
Symptoms of a heart attack can vary, but the most common include chest pain or discomfort, which may feel like pressure, tightness, or burning. This pain can radiate to the left arm, back, neck, or jaw. Other symptoms may include difficulty breathing, cold sweats, nausea, vomiting, and dizziness. Immediate medical attention is crucial, as time is key to minimizing heart damage.
Risk factors for heart attacks
- Advanced age
- Smoking damages arteries and raises blood pressure
- High blood pressure puts extra strain on the heart
- High cholesterol levels
- A family history of heart disease
- Being overweight