What are diuretics? Debate arises about safety in wake of Jodi Vance’s death

Jodi Vance’s sudden passing has raised concerns about the risks of diuretics and other performance-enhancing substances in bodybuilding.

On March 2, 2025, her coach, Justin Mihaly, addressed the situation in a social media statement with the support of Vance’s mother, Jenny.

Mihaly revealed that Vance’s health had become a growing concern in recent weeks. While she was not preparing for any immediate competition—her next event was still 20 weeks away—he stated that she had taken two extremely hazardous substances without his or her family’s knowledge. He clarified that these substances were not part of their agreed-upon protocol.

Medical reports indicated that Vance’s potassium level at the time of her hospitalization was an alarming 9 mmol/L—far above the normal range of 3.5 to 5.2 mmol/L. Mihaly suggested that this could indicate the use of a potassium-sparing diuretic, though he could not confirm the exact circumstances.

He explained that such diuretics, when combined with fat-burning drugs, can have severe and even fatal effects on the body.

Diuretics, also known as water pills, help the kidneys remove excess salt and fluid from the body through urine.

They are commonly used to treat conditions such as hypertension, heart failure, and kidney disorders, including kidney stones. There are three main types of diuretics: Thiazide, Loop, and Potassium-sparing.

While they are considered safe when used as prescribed, side effects can include dehydration, muscle cramps, dizziness, and drops in sodium and potassium levels. A severe potassium imbalance, known as hypokalemia or hyperkalemia, can lead to dangerous heart complications.

Mihaly stressed that bodybuilding as a sport would be better without diuretics, calling attention to their dangers. Despite the tragic circumstances, he praised Vance’s commitment and work ethic, saying it was “second to nobody.”

At the time of her passing, Vance was attending the Arnold Sports Festival to coach and support athletes. Her last major competition was the 2024 NPC Battle of Texas, where she placed third in the Women’s Physique division.