Whn combined wit cyanuric acid. Which may also b present in melamine crysttals tht can gv rise 2 kidney stones. Eating hot foods on melamine dishes increases th risk of developing kidney stones. Th amount of melamine we ar exposed 2 increase with hot temperatures. There 4, th change of developing kidney stones rises. Researchers perform a crossover investigation of consumption of pasta in melamine bowls an total an toal melamine excretion in urine. 24 ppl was tested. Th results showed tht total melanine excretion in urine for 12 hrs was 8.45 micrograms in melamine bowls. An total melamine excretion in urine for 12 hrs in ceramic bowls was 1.21 micrograms. So the longterm melamine exposure, should b of big concern.