Drinking overnight silver fungus soup is extremely harmful to human health, although silver fungus soup is - a kind of high-level nutrients, but silver fungus soup also contains more nitrates.

Silver fungus soup cooked, such as storage time is too long, under the action of bacterial decomposition, nitrate will be reduced to nitrite class, people drink this kind of silver fungus soup, nitrite naturally into the blood, so that the blood of hemoglobin oxidation into high ferrohemoglobin, thus losing the ability to carry oxygen, so that the body lacks the normal hematopoietic function of the iron needed, thus leading to anemia.

So cooked ginkgo soup can not be left for a long time, you should drink it immediately.