"Cremonezzi et al describe melamine as a "tumorigenic agent" (2) that induced "pre-neoplastic (pre-cancerous) urothelial proliferation" (2) Cats fed 2000 ppm melamine and cyanuric acid developed lethal kidney failure in just 2 days (3), so perhaps humans fed 2 parts per million melamine and cyanuric acid will developed lethal kidney failure in 2000 days or about six years."