Doctors at the University of Arkansas for Medical medicine found a 56-year - old man 's kidney problems stemmed from drinking too much iced tea . Black tea contains oxalate , a chemical compound to produce kidney failure and sometimes leads to kidney failure . The unidentified man will likely spend the rest of his life in hospitals .
Doctors at the University of Arkansas for Medical Sciences found a 56-year-old man 's kidney problems stemmed from drinking too much iced tea . Black tea contains oxalate , a chemical known to produce kidney stones and sometimes lead to kidney failure . The unidentified man will likely spend the rest of his life in dialysis .