Coffee and tea also contain antioxidant compounds that may help protect cells in the kidney from cancer-promoting damage, the researchers point out.

此外，研究人员指出，咖啡和茶中含有的抗氧化物质能够保护肾脏细胞免受伤害。

Tea scale contain cadmium, lead, mercury, arsenic and other harmful metals and some carcinogens, such as nitrite, can cause kidney, liver, gastrointestinal lesions occur in other organs.

茶垢中含有镉、铅、汞、砷等多种有害金属和某些致癌物质，如亚硝酸盐等，可导致肾脏、肝脏、胃肠等器官发生病变。

Tea, coffee, dark chocolate, spinach, nuts and wheat bran can also increase the risk of certain types of kidney stones.

茶，咖啡，黑巧克力，菠菜，果仁和小麦糠都会提高患某些类型肾结石的风险。