It is recommended not to drink. After the overnight silver ear lotus seed soup will produce a lot of nitrite, harmful to the body. There is a good way to drink fresh gingko lotus seed soup: before going to bed at night to the right amount of soaked gingko in a kettle and pour boiling water, plug the bottle stopper, lotus seeds are also another soaked with cold water. The next morning, silver ear and lotus seeds poured into the pot boiled and then ten minutes, put some honey or rock sugar can open and drink, very convenient, I am so dry.