The researchers, who wrote about their patient in the journal HeartRhythm Case Reports, explained that the “exact composition” of the supplements often varies widely.
They also suggested there is still a lot to be learned about the properties of these supplements.
The woman they treated went to the hospital after passing out but had suffered from dizziness for a month before admission. It turned out the dizziness was down to a change in her heart rhythm.
She had developed a potentially life-threatening heart rhythm change known as Torsades de pointes.