Researchers from the University of Florida suspect that a man’s energy drink consumption played a role in the heart problems he experienced one day.

There seems to be growing evidence of energy drinks possibly having a negative effect on the heart, finds a team from the University of Florida.

Their recently published paper profiles a 28-year-old man with no prior health problems who was diagnosed with atrial fibrillation and rapid ventricular response, or an abnormal heartbeat and elevated heart rate, respectively.

He admitted to drinking two Monster energy drinks in addition to two to three beers a day.

After getting treatment, his heart function normalized, and one year later, he has reported no residual abnormalities.

As such, the paper states, “We believe that energy drink consumption played a key role.”

The researchers point out that each Monster energy drink contains 160 milligrams of caffeine which is “four times higher than that of coffee.”

While 400 milligrams is considered a safe daily maximum intake for healthy adults, the team suspects other additives in the beverage can exacerbate the negative health effects.

While the paper did not prove a causal relationship between energy drinks and heart problems, health professionals are advised to be aware a link could exist.